plastic stock assortment

Good hobby and art stores will have styrene in various shapes. Most are too "flat" to turn on a lathe reasonably.

MSC

sells nylon rods/squares/tubes as short as one foot for very reasonable prices.

Tim.

Call around the local machine shops and find out who does plastics machining. They often have dumpsters filled with drops

Gunner

"Pax Americana is a philosophy. Hardly an empire. Making sure other people play nice and dont kill each other (and us) off in job lots is hardly empire building, particularly when you give them self determination under "play nice" rules.

Think of it as having your older brother knock the shit out of you for torturing the cat." Gunner

Onlinemetals.com has some plastic assortment packs that seem to be similar to what you are seeking

Koz

Mcmaster-Carr

has sample kits of various sizes of specific types of plastics. Woodcrafts Supply also has assortment kits of UHMW and nylon scraps for low friction jigs.