stainless steel mirror blades are 0.8mm thick which is about 1/64 inch and they still get scratched.
you can fit 8 sets of mirror blades on a sheet of 8 x 4 foot sheet of SS and including stainless and cuttings fees works out about $35 a set here in Aus. Make a sheet or 2 and sell to mates in your local area for a small mark up to cover the costs and get them for free and some of your time