I think Wilco do indeed have an STC 182RG mirror. I found this aircraft up for sale which has them. Looks like there is a mirror strapped onto the right wing strut.
Cessna TR182 For Sale Turbo 182RG - photowoz's Photos
I think this might be the part number - SA2790CE. I did have a look at putting mirrors on my 182RG after I met some Cardinal owners in a bar (never a good thing to do - and don't ever talk to them about squat switches). However, my nosewheel gives such a big clunk when it locks up or down I am not left in much doubt as to where it is. After your incident however, I can imagine why you'd want to do it.