Form for Right of Redemption

I am going to purchase the right of redemption on a short sale I am working on. I am unaware as to the specific contract I need to get signed by the owners. Could someone email me a contract, or refer me to a website that has one. I have searched these forums to no avail.

Hopefully going to be having the contract signed tomorrow, Thursday 7/27, so if anyone could help, it would be greatly appreciated!

Thanks!