I took a wet plate workshop a few years ago, and have a lot of references for places to find supplies. A lot of the chemicals are so toxic that you need to be a chemist to get the proper permits, if you want to fix w/ cyanide. But you can find a lot of the equipment, like camera's and lenses on ebay! I never made the effort to set up on my own, mainly because of expenses.
Ooo, check out John Coffer, he has wet plate and tin type workshops. He doesn't have electric and the workshop participants live in teepees. He kinda got people back into wet plate. He has a manual that you can order too.