I've got a few websites and blogs in which I sell a digital product. I've been using E-Junkies to Email the file to the customer after collecting payment via PayPal. This was a good arrangement for one off payments, but now I want to create a membership site and need Recurring Payments. My website is not using a CMS like Word Press or Drupal so I can't use one of their third party add-on. Any suggestions?