Add the PMPro meta box to a CPT. Add this to your plugin/etc.

pmpro-cpt.php

<?php
/*
	Add the PMPro meta box to a CPT
*/
function my_sensei_course_meta_wrapper()
{
	//duplicate this row for each CPT
	add_meta_box('pmpro_page_meta', 'Require Membership', 'pmpro_page_meta', 'course', 'side');	
}
function pmpro_cpt_init()
{
	if (is_admin())
	{
		add_action('admin_menu', 'my_sensei_course_meta_wrapper');
	}
}
add_action("init", "pmpro_cpt_init", 20);
?>