What are the most likely Donor vehicles for the A 500 4 speed automatic?

I though that someone was making a PCU control for the RE units.

That would be very nice. Does anybody have a link?

Only ones I know of are over a grand, which is why I suggested the TransGo mvb kit

Holley sells a harness for their Terminator X Max PCM.

https://www.holley.com/products/fue...inator_x_gen_iii_hemi_harnesses/parts/558-473
Way over $1000 by the time you buy the controller, and no idea if you could run it without running EFI.

This one is new to me. Claims to fully control an RE, but needs VSS and TPS

http://www.e-transcontrol.com/dodge-transmission/
This one looks like a clone? Or maybe they are both clones?

https://etranscontrol.com/product/tcm-440/
I remember finding another one years ago that was listed for the 47/48RE (diesel) but sure seems like it would work for a 42/46RE.