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You should check this out-
http://solidbikes.bigcartel.com/
You can buy materials (headtubes, BBs, crank arms and bosses, dropouts, tubing etc) on the cheap, get some tubing and weld up your own things!
I am actually considering buying the crank arm tubing, pedal bosses etc and having a local place weld em up for me. I think that'd be neat! Or maybe a frame? Or some bars!
"Hey anybody ever make that mistake like right when you wake up in the morning and you believe in yourself?" -Kyle Kinane
"BIKES!" -Tom Segura