Having sustained similar damage to my 2011 when, as I was taking it around my parked car it slipped on the wet grass and fell over onto the car, I feel your pain. It was a two-fer, as I also put a nice dent into the fender of my car.
To get a new mirror and housing, and new upper and lower cowling plastic ran me $1,300 including shop labor (which wasn't much). Haven't appraised the car, but I'll bet it's half that, at most. Problem is, I don't care what the car looks like, but I couldn't stand having my Connie look anything less than perfect.