Add digital code delivery to BigCommerce store

Hi everyone, I'm looking to add a digital code delivery system integrated into my BigCommerce store, if possible. Yes, I know about FetchApp, but its clunky and barely supports BigCommerce anymore. The ideal candidate should know BigCommerce very well. Here's what I need: - Customer pays for a product. - Once payment and order is completed, the system selects 1 pregenerated, one-use code and emails it to the customer, then marks it used or deletes it from the list. I should be able to easily add more codes to each product within the BigCommerce interface. Is this possible, and not too expensive? Thanks! Derek