Digital Delivery Instantly For Website and Ebay Orders

I am looking for a software similar to [login to view URL] and e-junkie. I sell Digital codes and Printable codes from a list of premade codes. So how it works Text Codes (For customers who don't want a Printable code only a code in text format) -I upload/add a list of different codes to my database (different database for each item i sell) as shown in attached images from keysender. - Customer makes purchase, they receive 1 (or number of codes they order) of the codes that are sent instantly to there email used for ebay or PayPal (prefer ebay). When ordering from site, it sent to there check out email and attached to there order page. - once that code is sent to buyer, its marked as used and removed from the available list (as shown in attachments) - Each database will have many different unique codes, so each item has there own database to receive code from. **Printable codes as Attachments** Here is the important part i want that keysender doesn't have. I want the files (PDF OR JPG Printable codes) to be sent to buyers email As ATTACHMENTS. Unfortunately, keysender sends them as a downloadable link and many customers don't like the link or download from a link they don't trust. I also want my site to be set up for other individuals who sell digital items like mine to be able to create account and sell as well like making a account from keysender.