Paddle replacement pieces.

[NightSprinter]

Does anyone know where to get actual pieces inside a paddle's potentiometer (mainly the black "Ohm"-shaped piece that helps determine the paddle's position)? I broke a black plastic-y piece inside a paddle from an Atari2600 pair, and want to know if I can get it replaced. I'm willing to pay the $3.50+shipping from Best Electronics if need-be, but I want to know if I can replace the individual pieces for cheaper instead.