Here's the 9-T-79, pretty isn't it? Finish is almost perfect, I almost want to get it working as a B&W set and leave it alone...
The options I can see with CRT mounting on this cabinet are:
Remove 19" mask, mount 16" one on a piece of plywood, paint the same off-white color, then install into the cabinet.
Create wooden mounting for CRT, install in cabinet.
Somehow modify 19" mask to accept 16" tube.