I need a part for the driver's side rear view mirror on my 2004 MCS. Specifically, I need the plastic 'cage' that surrounds the motor that moves the mirror. It's this cage to which the mirror mounts. As best I can determine, this cage is not separately available; it comes with the motor. My motor is fine, but the cage is broken.

Hopefully someone has had to replace a mirror motor that went bad, and has the old one sitting around.

Can someone help me out? TIA.