I'm looking for the custom add-on kit that was produced for Powermaster Optimus Prime a while back. The kit included a better head as well as better wings. I think it may have also included different fists. I think the kit was released through a website, but I can't remember which one.

Anyway, I just got my "economic stimulus check" and I'd like to stimulate someone's economy with it (read as "willing to pay for this rare piece!). Any information about the set or where to get one would be greatly appreciated. PM me if you want to get in contact.