Zenith 2004 Console Television

[Console User]

Looking for a backup CRT for this Zenith 2004 Console Television.

It is Model number B27A74 R. It has Serial number 421-42130169. The number on the original CRT that is still in it reads A68ADT31X03. I thought I saw somewhere where they had a Substitution CRT for this TV that read
A68AGD01X. I would appreciate any help or suggestions in being able to locate a good CRT for it. Thank You.