Window regulator

Hey, does anyone know where I could get a hold of a driver side power window motor?
Would prefer to buy a new unit rather then a 20yo one which probably won't last long.
 
Thanks.
 
*EDIT* I have a feeling that the gear on the motor has just stripped... Does anyone know whether you can just replace the gear?
 
I'm on the EPC and '90168-50040' might be just the gear?