Well, Wendell and Welters were my first choices. How about StaMM Sales in Kansas? In Washington KS, maybe.
After that, you may need to start calling Salvage yards, Like Baker/Abilene or Audubon tractor parts. Audubon is in IA, I don't know where Baker/Abilene is located.
MM Del would come as close to knowing where to find one as anyone on here, I would think.