I'm looking for a manufacturer of small plastic gears. I have an old-fashioned popcorn cart with an electric motor and gearbox that turns a paddle in the popcorn kettle. One of the plastic gears in the box has worn out twice when the paddle stuck and stripped this gear. I ordered the whole gearbox once, but just need this one gear. It's a concentric gear, with the teeth on the larger gear angled to work against the worm gear from the motor and the smaller one working with another speed reduction gear. The whole thing is only about an inch in diameter. Does anyone know where I can obtain such a gear?