Not worked out how I'm going to do mines either - I want all the mirrors shaped and primered at least before I worry about that
I might split the glass from the rubber/plastic backing thats on it and cut it to size and try and mount that in the mirror then get some reflective plastic and cut it to shape then get some sort of sticky material and join it to that mirror backing...
But I'll cross that large bridge when I come to it
Any hints or tips Craig ?