Cubecart 3 Mod

Hi i am looking for a mod that will allow my members of my store to add a product to the sites database instantly after payment so i will be looking for paypal IPN intergration. So it must have an admin page where i can add a certain percentage and that percentage will be charged on their final product price which they must choose first. so say i want 10% of their chosen price which is £45 once they hit submit it will charge £4.5 and the paymetn must be done by paypal and once paypal confirms redirects back to the site and their item details will be added to the database and Their item MUST show up on a page that will be in their account details where they can only see their items added and they can only remove their items. This is like amazon where members can add products to the sites database but instead of waiting for the procut to sell to get a percentage of the price i get the percentage first and the item stays on the database until they remove it or sold.