Like I said earlier, They are NOT going to jump out of the woodwork and say, Here I am, You will have to get off the interstate and maybe even off the Information Super Highway and beat the bushes to find one. I am looking every time i travel.
I do think that the "Camper Special" trucks back in late 60/early 70's are candidates as well as some panel trucks, and maybe even some 1 ton or C30 model Chevy trucks. Also some Jeeps may have used Eaton gear sets. Checking in on a jeep forum may have rewards. Good luck
Jerry



Jerry