Enthusiast looking for a specific part

[Mikey3606]

Hi,
I am new to this vintage CRT thing. I just started last year.
I am looking for a 19ABP4 Picture tube for a 1960 Philco: Chassis 12J28A / 12J28AU, Model No. K3244SA Portable TV.

I got from Higgins In-Home TV & Big Screen Repair in Milwaukee. He had completely refurbished the set prior to my purchase, but he did inform me that the previous owner left it there because he wasn't happy with the tube output. (dim picture). I took a chance on it and came back with a rejuvenator, but to no avail. We bought a BK Model 466 rejuvenator for him to use. We had given him the specs, and all the setup charts as well as the tube adaptor. Mr. Higgins and I were both disappointed, but I guess this is the way it goes sometimes. I DO NOT blame him. He's been at this for over 40 years. Is there anyone that could help me source a new/replacement tube? I'd really hate to see such an otherwise great set go to the recycler. It's for my son, who is really into vintage CRTs/TV's (he already owns a vintage Toshiba CF3275K. It's a power swivel tv with a Carver amplifier - great set!). Any help would be greatly appreciated.