Was there any specific year 225 you wanted? Perhaps you wanted one out of a car and not a truck? If any type of 225 will do, have you checked the Y-yard there in Effingham for a late 70s/early 80s truck for a slant? You might be able to find one, or maybe talk to them and see if they can find you one in their parts network. Unfortunately, I think our closest Pick N Pull around here is over in Danville, and I don't know how they are on Mopar. Good luck in your search, and I'll keep my eyes open up here for you.
