Well, so far I’ve gotten close. Kevin, C5Z, knows the whereabouts of a TCX-128 system. I guess you could call it the evolution of the 2260. He’s going to help coordinate that for me and I greatly appreciate it.

I found the power supply for the 2260 but no KSU so far. I’ve also found a TC-12 KSU (as far as I can tell it’s essentially a 1236 but uses 2 pairs?), but no power supply for it. It looks like it may be compatible with the 2260’s power supply but can’t tell for sure. Power specs in the manual aren’t detailed enough for me to tell.

So, still looking for an 820/1236/2260 if anyone runs across one. And in the meantime I look forward to getting the TCX-128 running.