I am dealing with a guy to get some track rollers for another machine. He is parting a couple D4s as I understand it. From what I gather, the guy is ready to send stuff to the scrap yard. I think there was an engine, radiators, rollers, track chain, etc. Probably some cheap parts if you guys are shopping.
Just shoot me a PM and I will pass the word. This guy is in S central KS.