Weaver E-Unit

My suggestion might be to simply find a used Weaver unit and rob the board out of it or conversely purchase an aftermarket reversing board.  Unless you are running multiple units together, the board really doesn't matter as much as the function you are hoping to achieve. 

You might also try simple things like checking the electrical connections, making sure the wheels and pickup rollers are clean, and finally cleaning the track.  I know it sounds basic, but two weeks ago I was running trains at a club layout and all my train kept stopping on a frog of a turnout.  After switching engines it did it again.  I thought the frog has lost power.  No, the track was just dirty.

I have an extra Weaver E unit.  It was taken out of a reportedly new Weaver RS-3 Send an email if interested and I'll send you pictures.

GG1 4877 posted:

My suggestion might be to simply find a used Weaver unit and rob the board out of it or conversely purchase an aftermarket reversing board.  Unless you are running multiple units together, the board really doesn't matter as much as the function you are hoping to achieve. 

You might also try simple things like checking the electrical connections, making sure the wheels and pickup rollers are clean, and finally cleaning the track.  I know it sounds basic, but two weeks ago I was running trains at a club layout and all my train kept stopping on a frog of a turnout.  After switching engines it did it again.  I thought the frog has lost power.  No, the track was just dirty.

All my other engines run fine on this track and it was just wiped Sat.

Where can I get an aftermarket reversing board?

Williams (Bachmann) sells separate sale boards, Dallee is another source, or you can upgrade to ERR with full sounds and TMCC.   They are pretty easy to wire. 

Good luck!

"You might also try simple things like checking the electrical connections...",

That also means popping off the body, pressing any plugs and/or boards securely in place, looking for wires on the verge of becoming disconnected or being pinched, stray bits of wire (clean it with canned air if you have it - otherwise blow in its ear...).

In other words, look at the thing. Just get familiar. Probably won't fix it, but 10% of the time it actually does (ask me how I know), and it's free.

Dallee sells e-units; used ones on eBay; pretty much any 3RO unit for DC motors unit will do.