I need to find the rubber ring for the Harbor Freight Mini Tire Changer. I have one at work mounted up on a old brake rotor and it's the bees knees for changing mini tires on the full size tire machine. Stopped by the shop today on my day off and apparently they figured out how to lose the rubber ring. I know I could just go buy some hose and split it and put it on, but the rubber ring is made of softer material than rubber hose. Any ideas?