New Materials for Digester

How hard can it be to find the following materials for a medium-scale anaerobic digester?

-Used 18L clear plastic water bottle
-Large Mylar helium balloon
-Plastic water bottle cap (with the "no-spill" insert-see photo)
-Copper tubing (40 cm long, 6.5mm (1/4") inside diameter)
-T-connector for plastic tubing (barbed, 6mm or ¼" long)
-1 cork (tapered, 23mm long)
-Clear vinyl tubing (1.5 m long, 4mm or ¼-inch inside diameter)
-2 barb fittings (¼" x ¼")
-Ball valve (1/4")
-6-8L manure pellets (goat, sheep, llama, rabbit, or other ruminant)
-Rubber gloves
-Large plastic funnel (can be made from a 4L plastic milk jug with bottom removed)
-Wooden dowelling or stick (30 to 50 cm long, 2-3 cm thick)

Evidently pretty hard. I went all over town today to try to find the above materials. Some of which were easily found but the ball valve, copper tubing, T-connector and 2 barb fittings proved to be the most difficult to find. I have found everything aside from the T-connector, the mylar helium balloon and the 6-8 liters of cow manure.