A huge thanks to everyone providing useful information and resource links, on and off list. My apologies; I'm a bit overloaded atm, and am getting behind on individual replies. I'm keeping all replies and will respond eventually.
About the front panel lights board: It's a relief to discover that it's simple and making a replacement will be easy. But before anyone leaps in and starts working up a PCB design, be aware that on my one at least, a replacement panel will use LEDs not light bulbs. Once assembled I'd like to not have to frequently disassemble it, forever replacing dead bulbs. This overrides historical veracity. I can do the PCB myself. As for the LED color, how about super-bright blue? Or violet? Ha ha, just kidding. Dim warm orange it will be. The original power supply - I'm amazed to hear it was a simple ferro-resonant transformer regulated type, with just rectifiers and caps. How cool, that the computer circuits don't care if the DC rails are a little off. I hope I can find an original, since that really is part of the machine's historical nature. Guy
