Ferrari Mailing List: window motor 1981 308

[Michel Savard (mysavard]

Ferrari 1981 308 GTSi. I think it's time to change the window motor on
the driver's side. I cleaned the switch twice and now nothing moves. No
rush I got all winter to do it.
Rutlands from Georgia  has one (OEM)  for $120.00 
I was wondering if I could buy a cheaper one (non-OEM) ? Any ideas ?
Before I ask my mechanic to do it, is it hard to change ? 
 
Thank you!
 
Michel Savard