where can i find shifter cables?

I just had a problem with my shifting stick where one of the contacts broke. All it is a knob and it should be working. Saturn doesnt sell those knobs. I have to buy the whole shifting cable kit, which runs for $180. The labor is an additional $225. I think is totally stupid for a the so called "different car maker" to made this knob not available for people to buy without having to spend all this money on those damn cable. People has talked about using rubber-bands or wire-ties. I tried both of them but it didnt hold for long. So far the black electric tape is helping me use the car until I find a solution. I dont have 425 dollars to give away to Saturn. Does anybody has a solution to this problem.???