@lofgren used film on this mirror. I never used film so I can’t recommend any vendors to you. Perhaps someone else will. I think most people are using acrylic mirrors or glass mirrors. Glass mirrors are best, acrylic mirrors come next, and then film. Again, I’ve never used film but I understand it is a lot more work and perhaps difficult to manage, as well.
Do a search right here in the forum for “what kind of mirror to use” and you should find plenty of advice