Different kind of Credit Module

[zebraplayer]

Hello,

 

I was wondering if there exists a credit module that instead of offering a credit of a certain amount, it offer a credit for a certain quantity. For example, instead of giving someone a credit of $20.00, I want to give them a credit to purchase any 5 items. Furthermore, I need to be able to specify which items are elligible for the credit. I know that is kind of specific, but though I'd give the question a try.

 

Thanks in advance for any help you can give me.

 

-zp