1952 RCA 21t218 "Lansford"

[spad7]

Hi,
I'm looking for the impossible. I need a 21AP4 metal picture tube for this set. That being said, does anyone know of a glass tube replacement for the 21AP4 and where I could get one ? I'm not a repair person, I just like old stuff that works. I have somebody working on it and of course the metal tube was doa. I'd love to get it working to compliment my Philco 47-1227 which does. Thanks,
Bill