I have a day/night rear view in my 56 and the silvering is gone. Is there a trick to take the glass out without ruining the case? Does anyone do glass replacement in these types of mirrors?

Y's guys rule!
Looking for McCullouch VS57 brackets and parts. Also looking for 28 Chrysler series 72 parts. And early Hemi parts.

MoonShadow, 292 w/McCulloch, 28 Chrysler Roadster, 354 Hemi)
Manchester, New Hampshire