Ken, I've got a RCA lyceum TV with pushbuttons on the front.  The tube number and model are missing, or I would give them to you.
Do you think it would be a good candidate for a swap?  
I have thinking about converting this TV so that I can connect arcade pcbs to it.  I think I might be able to swap the chassis and connect the monitor controls to the pots on the front for brightness, sharpness, tint, etc.