Whiskey Barrel & Barrel Heads
Used and weathered/not-so-weathered. Whole barrels from about $55, plus barrel heads, staves, hoops etc. I want one, and I want time to do something with it :)
Shipping from Kentucky

Polymer clay info
Glass Attic - "encyclopedia" of polymer clay information

Fabricating / Molding / Carving spheres on a tangent of a tangent I poked around for some techniques for producing spheres, and found:
Lapidary Digest - Sphere Making and a google groups search in rec.crafts.metalworking for sphere that turned up some interesting ideas and another pass at the same problem in rec.woodworking