So I did a very dumb thing and backed out too quick....crashed into the pole next to me and the back part of my mirror broke. I don't know if I have to buy a whole replacement or just the housing. I've gotten mixed info from other forums, and I am nowhere near being a car person so I have no idea where to start! Please let me know what I have to do.

Side note: My camera works, and the base of the mirror is fine. It moves perfectly fine. I could even put it back together and everything looks normal except for some cracks so I doubt I need to buy the whole thing.