price-input.php

<label for="nyp">
	<?php
	global $product;
	
	$text = '';
	
	switch ( $product->id ) {
		case 1:
			$text = 'Text for product ID 1';
			break;
		case 2:
			$text = 'Text for product ID 2';
			break;
		default:
			$text = stripslashes ( get_option( 'woocommerce_nyp_label_text', __( 'Name Your Price', 'wc_name_your_price' ) ) );
			break;
	}
	
	printf( _x( '%s ( %s )', 'In case you need to change the order of Name Your Price ( $currency_symbol )', 'wc_name_your_price' ), $text, get_woocommerce_currency_symbol() );
	?>
</label>