Same issue here, at 1 week my wifes hit the driver side mirror pulling out of the garage but only broke a plastic piece which held the mirror glass in. Our Toyota dealer wanted $663 plus install! And all I needed was a round plastic piece and motor that the glass attaches to. I found a passenger side mirror on
ebay and used the internal parts from that one to fix the driver side. Funny thing is everything looks perfect and works but the drive motor is backwards so up is down and down is up!
Of course once I got that fixed my wife backed into someone in a parking lot and now we need a new bumper!
Scuzzle