I have not tried this guy but there is this guy named Johnny. He advertises on Kijiji. His business is WiredRidez. I've seen his work twice in person and it looked like it was pretty good.
You can also contact this guy and see if he is in Ontario right now
http://www.hidplanet.com/forums/show...n-transactions
I know Norb @ Carbox has done a few retrofits before if you really want to go to an actual shop. His work looked very clean as well.