Rubber bands, clips and clamps, hairbrushes. Blacklights and strobe lights, mindfuck props, costuming, fake blood, stage knives, rope tricks, itching powder. Collars, leashes, bells, dog food bowls, cages, remote electrical shock collars.
Veterinary supply sells horse and dog bit gags, forceps, sterile needles, some restraints.
Craft stores sell leather and specialty rope. Tandy Leather sells horsehair, feathers, leather laces. Rope, winches, quick-release snaps, pulleys. Heavy duty ropes, carabiners, suspension harnesses. Clover clamps, spiked measuring and cutting wheels.