WordPress, Woocommerce, Cart page, add message and form (Gravity Forms) if customer country is not supported.

functions.php

<?php
    /**
        Display a notice on the cart page requesting people with Countries not supported to email us.
     */
    // http://hookr.io/actions/woocommerce_after_shipping_calculator/#
    function action_woocommerce_after_shipping_calculator(  ) {
        echo '
            <style>
                .action_woocommerce_after_shipping_calculator {background: #eee;margin-top: 10px;padding: 10px;font-size: 1.4rem;line-height: normal;}

                .action_woocommerce_after_shipping_calculator .message {}
                .action_woocommerce_after_shipping_calculator .message p {margin-bottom: 10px;}
                .action_woocommerce_after_shipping_calculator .message p:last-of-type {margin-bottom: 0;}
                .action_woocommerce_after_shipping_calculator .message ul {margin:6px 0 10px;padding: 0 0 0 30px;}
                .action_woocommerce_after_shipping_calculator .message ul li {}
                .action_woocommerce_after_shipping_calculator .message .contact-link {color: #ef7c33;}
                .action_woocommerce_after_shipping_calculator .message .contact-link:hover {cursor: pointer;color: #474546;text-decoration: underline;}
                .action_woocommerce_after_shipping_calculator .message .cart_contents {display: none;}

                .action_woocommerce_after_shipping_calculator .form {display: none;margin: 14px 0px 0px;}
                .action_woocommerce_after_shipping_calculator .form .gform_body ul li {padding: 0 !important;margin: 0 0 4px;width: 100% !important;}
                .action_woocommerce_after_shipping_calculator .form .gform_wrapper.gform_validation_error form > .validation_error {    margin-bottom: 15px;margin-top: 20px;}
                .action_woocommerce_after_shipping_calculator .form .gform_wrapper.gform_validation_error form .gform_body ul li.gfield.gfield_error {max-width: 100% !important;}
                .action_woocommerce_after_shipping_calculator .form .gform_wrapper.gform_validation_error form .gform_body ul li.gfield.gfield_error .validation_message {padding: 4px 10px 6px;}
                .action_woocommerce_after_shipping_calculator .form .gform_body ul li:last-child {margin-bottom: 0;}
                .action_woocommerce_after_shipping_calculator .form .gform_body ul li .ginput_container {margin: 0;}
                .action_woocommerce_after_shipping_calculator .form .gform_body ul li input, .action_woocommerce_after_shipping_calculator .form .gform_body ul li textarea {margin: 0;border-radius: 0;width: 100% !important;}
                .action_woocommerce_after_shipping_calculator .form .gform_footer {position: static;}
                .action_woocommerce_after_shipping_calculator .form .gform_footer input {width: 100% !important;text-transform: none;}
                .action_woocommerce_after_shipping_calculator .form .gform_footer input:hover {background: #474546;color:#fff;}
                .action_woocommerce_after_shipping_calculator .form .gform_footer img.gform_ajax_spinner {display: none !important;}

                .action_woocommerce_after_shipping_calculator .form .gform_confirmation_wrapper {    border-top: 1px solid #28a745!important;border-bottom: 1px solid #28a745!important;color: #28a745;text-align: center;padding: 10px;}

                .action_woocommerce_after_shipping_calculator ::-webkit-input-placeholder {color: grey;}
                .action_woocommerce_after_shipping_calculator ::-moz-placeholder {color: grey;}
                .action_woocommerce_after_shipping_calculator :-ms-input-placeholder {color: grey;}
                .action_woocommerce_after_shipping_calculator :-moz-placeholder {color: grey;}

            </style>
        ';

        echo '
            <div class="action_woocommerce_after_shipping_calculator">
                <div class="message">
                    <p>Currently you can only order online from:</p>';

                    global $woocommerce;
                    $selling_countries_obj   = new WC_Countries();

                    // Get selling countries
                    // $selling_countries_obj_2 = $selling_countries_obj->get_allowed_countries();
                    // print_r($selling_countries_obj_2); // [code] => name

                    // Get shipping countries
                    $shipping_countries_obj_2 = $selling_countries_obj->get_shipping_countries();
                    // print_r($shipping_countries_obj_2); // [code] => name

                    echo '<ul>';
                        foreach($shipping_countries_obj_2 as $k => $v) {
                            echo '<li class="'.$k.'">'.$v.'</li>';  
                        }
                    echo '</ul>';

                    echo '
                    <p>If you could like us to deliver to another country, we will handle your purchase directly.</p><p>Please <span class="contact-link">click here</span> to send us your order and we will contact you to take payment.</p>';

                    echo '<div class="form">'.do_shortcode('[gravityform id=2 title=false description=false ajax=true tabindex=49]').'</div>';

                    global $woocommerce;
                    $items = $woocommerce->cart->get_cart();

                    $output = "";
                    foreach($items as $item => $values) { 
                        $_product   = wc_get_product( $values['data']->get_id() ); 
                        $price      = get_post_meta($values['product_id'] , '_price', true);

                        $output     .= $_product->get_title()."\nQuantity: ".$values['quantity']; 
                        $output     .= "\nPrice: ".$price."\n\n";
                    }

                    echo "<div class='cart_contents'>".$output."</div>";

                    echo '
                </div>
            </div>
        ';

        echo '
            <script>
                jQuery(document).ready(function($){
                    jQuery(".contact-link").click(function(){
                        jQuery("textarea#input_2_3").val( jQuery(".cart_contents").html() );
                        jQuery(".form").toggle();
                    });
                });
            </script>
        ';
    }; 
             
    // add the action 
    add_action( 'woocommerce_after_shipping_calculator', 'action_woocommerce_after_shipping_calculator', 10, 0 );

?>