John, I also have spare 5 V for that reason. I will not sell any as they could bite me. I recently took a new (old stock) never run D&H Alco PA out of my glass case. Put in a new MTH fully charged green battery and it went 5 feet and died. I was waiting for my next load of PS-3/2 boards so I put in a rebuilt PS-2 3V board that George did for me. Done and over. As I stated many times, MTH did a great service to all by making the PS-3/2 board. I am a huge fan.
The poster can do what he intends to do and he should keep the 3/2 board in the back of his head.