A Joomla COM for secure digital downloaads.  $19.95

This script is running here! As your making a purchase here you are using this very extension. Consider this purchase a live demo!
The Stripe payment gateways is built in!

Add products. Paste your Stripe link and price_id, then paste a link generated for you generated automatically into your article.
When purchase complete your buyer gets a download link via email. It uses a single-use token so even if they share the link it won't work a second time, protecting your hard work.