Re: electrical issues
Don't like your chances of getting new motors! Best bet is to source them at a swap meet, wreckers or paper. It could also be the switches or wiring as well. Hot wire 12V to the motor to check if this is the problem.
If your central locking doesn't work, I'd assume that the driver's solenoid (I think this is the master) may be stuffed. Check that 12V is getting to it.