I know other guys were looking to get their rear view mirrors re-silvered. Have just had mine done at Duttons Glass and Mirrors based in Holloway Road, Birmingham (0121 622 1221). Cost £10+vat, and I'm really pleased with it. So if anyone needs anything re-silvered then try these people.
http://www.duttonglassandmirrors.co.uk
http://www.duttonglassandmirrors.co.uk