Drew I know you have probably already tried this but Craigslist is the best for around me for that stuff. I have bought a couple of old real to real recorders off there for like $10. Also I go to the University of Michigan property disposition store and find all kinds of freaky stuff, so check your local major colleges. I just bought a cryogenic tank for $75 that sells new today for $2000. You would have thought I found the Crown Jewels the way I was hovering over it keeping people away till I got it paid for. They have all kinds of electrical gadgets with names I am not smart enough to pronounce there, but they look cool and that's all I care about.
By the way are those stands I sent going to work out for you?