Driver side mirror replacement

[Need4Speed3]

While reversing out of my garage, I accidentally damaged the driver side mirror on my wife's 2010 CX-9 (whistle). The mirror glass itself is fine, it's just the plastic housing part that's damaged. Do I have to replace the entire mirror assembly or can I just get the plastic part replaced? Any idea of the cost?

 

[ceric]

Doubt it.
Last I checked for my wife's Prius, Toyota sells only the whole assembly for side mirrors.
It costs around $200+.
Installing is easy. Save labor cost by DIY.