You could try contacting Mike Koste,
[email protected] . His trade name is "Gobs of Knobs." That's a rather obscure TV, but who knows . . . he may have something that would pass casual inspection.
I'm jealous that you found the metal one with the signal meter. I have the more boring TV-7W in wooden case.
http://www.antiqueradio.org/NationalTV-7W.htm
As John mentioned, it is a good performer, and quite well built, like most National products.
Phil Nelson
Phil's Old Radios
http://antiqueradio.org/index.html