Found a roundie! Well, the shell of one anyway...

[NIPPERTHEDOG]

try to fit a retro 27" TV that uses manual analog knobs, 27" picture tube fill area of 21" perfectly. You may have to modify original CRT mounts. try to mount controls in all the right places(i.e. tint goes where original tint control was , etc). Make extension wires for all controls moved to fit inside your cabinety . I ACTUALLY DID THIS TO MY PICTURE SYMBOL (CTC-4) TEMPORARILY UNTIL RESTORATION GOT UNDER WAY!!! Was cool setup- I watched conversion TV for one year before original innards put back in. TRY this and you should be very happy with result, you'll need to find some retro knobs to finish the job as well as mount innards of tv securely. Just a hint, find extra flybacks to to you put in as older flybacks are always going obsolete and never made again. Please keep me on status of your project.