The centrifuge switch won't engage the capacitor - looking for parts

I have a craftmans air compressor that won't build pressure. I have checked everything, check valve start capacitors, start switch, you name it. Finally found the centrifuge switch is not engaging to get capacitors to work. I was able to get it to work once or twice. Where can I find a switch like this. The model number of the motor is 5kcr49tn2235x Ge motor.
Thanks Jon