Add thousands of gift certificate codes to WooCommerce / WordPress

We have an eCommerce site running on WooCommerce/WordPress We would like to send out physical gift cards to hundreds or thousands of people. We can put each unique number into the Coupons tab of WooCommerce but, with thousands of coupons, that would be extremely tedious. We would like someone who can create a plugin or otherwise import hundreds or thousands of unique gift card details at once. WooThemes says: All coupons are actually posts in the database, just having a different post_type field. There are plenty of ways to script an import application, where your main function will be wp_insert_post() : [login to view URL] We need this done very quickly and will pay upon completion.