Electric window repair

Hi,
Have just discovered the rear PS window doesnt work.

Can hear a click when the switch is operated.

I thought I might have read a thread somewhere on the repair procedure, couldnt find it though.

Sounds like a relay is operational, maybe the motor is gone, can these be repaired, replaced with a cheaper (ie commodore unit), or will I need to get one froma wreckers?

I will investigate soon, any tips welcome, including trim removal?