pic: Pulley?

[DonRotolo]

Aside from making it from 3 pieces (use 3 long screws and nuts to hold the ends together), or having Kevin's team make one up for you (Note that "Priority Mail" from the post office has a flat rate box, send anything that fits in the box for just under $9. Even lead plates.), you can find Electrical Wire on spools like this. Go look at Radio Shack to see small versions of what I mean, an electrical supply house (or Home Depot/Lowes/hardware store/etc) will have them in a variety of sizes, and once they sell the wire off a spool they usually throw it away. Or if a parent is an electrician.

Good luck,
Don