Finder Fee Contract

Hello can anybody tell me where to get a Finder's Fee Contract?
What I mean is, I am in the middle of some deal's and the seller is asking their set price and then I add a $1,2,or 3k profit for me and the buyer agree's to pay that full amount. I just need the contract that separates the additional Finder Fee for me in there to the seller so I get my cut for finding the buyer. I have seen other people talking about the Finder Fee Contract on other blogs and its not here in Dean's library so I am asking if anyone knows where I can find it or go buy it?

Lisa Calhoun