Problems with A/C

Mopar had several different thermostat clutch cycling switches.
1) a mechanical two wire
2) a electronic 3 wire
3) a electronic 4 wire.

Within the 3 wire there are different part numbers, depending on the vehicle application.
I have never looked into the differences. It might be the temperature setpoint, or it might be whether it switches, ground or hot, or it could just be the plug connections.
I would just buy the correct switch. But now it seems, like the one he needs is not easily available, but it might be possible to use a 3 wire switch that is for a different vehicle. I need to look into that.