Pulley kit to step up a stepper RPM

[HankMcSpank]

Hi there,

I'm about to build my second coil winder...it'll be loosely based on a couple of stepper motors contorolled by Mach3 & a user plugin I've found on the Artsoft website (which was only 80% complete)

the thing is...stepper motors aren't famed for high RPM, so it seems that 4:1 gearing would be prefereable using pulleys (this person has used a pulley system in his system

[ame="http://www.youtube.com/watch?v=Yr2DgNFcp4I"]YouTube - cnc pickup winder - main motor test[/ame]

the thing is where can I source such pulley wheels & belts? (preferably with centre holes/bores that are stepper friendly....Argos don't sell em!

Many thanks