I have since found a few power supplies on eBay, other Audrey sites, etc. However, no one still has ever responded that they actually put together a working replacement made from scratch...
Hunter 112, I haven't seen you posting much in a while! It's funny you mentioned the printer cable. I bought a Mac 6' 8 pin mini DIN print cable extension. I wanted to be able to extend the power supply cord another 6', so this seemed like a logical way to do it.
Plugged it in, and the 3Com screen comes up for a second,then blackness.
I've checked to make sure I've got tight connections, but no dice. The printer cable is a lighter guage wire than the Audrey power supply, so maybe that's it.