Eye Glasses + Contact Lenses Webstore

We are looking out for a team to develop our Online Webstore for an Optical Website. The Project will based on Zen - Cart / OScommerce. Website will need to have Online Payment Gateway through CCAvenue. So Developers who have scripted shopping cart with ccavenue are preferred. Affiliate System To Be Installed Product Attributes For Contact Lens - Spectacle Power will be Needed While the sale item (contact lens) is one, the prescription for both eyes is different and a user should be able to order different quantities for the left and right eye simultaneously. Thus, while the product details page is but one, we need to process different quantities for the left and right eye together with prescription details. For the prescription details we have used product attributes. Using this approach we have been able to record the prescription details for the left and right eye but for the quantity, only the total quantity is being recorded. An exact idea of what we want to achieve can be seen from the following shopping carts for a similar product from a different manufacturer. [login to view URL] or [login to view URL] Same will be the case for Prescription Power for Spectacle Frames. Any suggestion that provides the solution will be highly appreciated.