Just a heads up - I just paid $39.99 for the tumbler pictured below at Harbor Freight...it was marked at $49.99 but rang up $10 cheaper. It is "chicago" branded, item #93252. They also had 25lb boxes of walnut media for $25, or a replacement bowl that came with ~4lbs of walnut for $12.99.

Oh and a big thanks to gssixgun and everyone else that contributed to this thread...fantastic idea