01 Windstar passenger side mirror

Anyone ever replaced the rear view mirror (the ones outside, on the doors) glass? I have the power mirrors with the turn signal in the glass and I broke the mount. I got another complete mirror assembly, but it does not have the turn signal in the glass. Can I remove the glass from the old one to put in the new one without breaking the glass, and if so, how is that done? Thanks for anyones help.