magento gift cards+multi vendor

In my magento store, I want to have different vendors of gift cards. 1. Each vendor should have 1 product - gift card. Customer should be able to choose value of the gift card (10, 20, 30, 40, 50 $). 2. After buying the gift card, the customer receives by email a printable time-limited gift card with code to use in vendor's REAL store. 3. The vendor, after customer buy a gift card, also receives info about sold gift card with code details, and info of the amount (- my privision) in order to invoice me as a store owner. I know there already exists some similar extension which needs few modification in order to suit my needs. When placing a bid, please give me a hint of which extension will you use as a base for this project. Thanks.