Best place I know is stock drive.
Precision Mechanical Components Timing Belts Pulleys Spur Gears Couplings Bearings Sprockets Retaining Rings Brakes Helical Gears Clutches Universal Joints
I'm looking for really cheap timing/cog/motor belts (whatever they're called...) like the ones found in inkjet printers (the one that moves the carriage), but I haven't had much luck. Anyone know where I could get some of these small belts cheaply?
My hobby website: www.roboticsguy.com
Also PolyBelt Co. in New Jersey, bought from them and recommend. Use their website to look up what you need. -Vinny