New mirror in mirror-in-lid TV?

[dtvmcdonald]

I've decided my Marconi 702 needs a new mirror. It appears to
be 14x22 inches, at least very close.

It would be best to get a front surface one. I had trouble finding
somebody to sell me one. I finally did, in acrylic, for $192.

Has anybody else found one cheaper, acrylic or glass?

I've been unable to find a second surface one that is either thin enough
(<1/16 inch) or antireflection coated.

Has anybody found one?