Drove around today with no mirrors and I had to be very careful and turn my head around to check to make sure I was clear before merging lanes.
I searched around and these can be had for around $500 shipped from getbmwparts.com but I decided to get the non dimming ones for $136 shipped instead. I will miss the auto dimming, but don't think I really ever felt like I couldn't live without them so decided to save some (well, a lot) of $ and get the non dimming. Plus I have tints so don't really need the dim feature.
Still pisses me off that this happened but I'm thankful that it wasn't any worse.