A few years ago I went dumpster diving behind the local Harbor Freight. You should see what they throw away! I had a car load when I was done, took it to the shop and spread it out. They had some stuff where one piece was missing but they had 3 or 4 like that, so I took parts from several and made some complete sets.
There were even those rolling mechanics seats where the wheels had just lost a screw, so after a little work they were as good as new. I'm not sure they still just toss it away without crushing it, but you guys might want to periodically cruise behind your local HF late at night to see what you can find.
Don