[Arran]

There is a sort P.C board substitute for twist lock cans called an "Adapt-a-cap", but I think that they are overpriced, and not really fit for purpose since they are using through hole solder pads on a P.C board for not only connecting the capacitors but connecting the wiring. I think that the method that Mike, and others use with restuffing the original can is more economical, and mechanically stronger then just tacking wires onto a disk of P.C board. It's like they didn't take into account that in vintage radios and TVs the base of these capacitor cans was also used as a terminal strip, not only for the capacitors but the ground lugs were used for other parts. If they really wanted to make the adapt a cap useful then instead of making it just a glorified P.C board they should make it like a terminal strip that fits over the hole in the chassis, but one in which you can put a can on top of to cover the radial lead electrolytics above the chassis. I don't think they even make one that fits in the way that one does on your Philco chassis, where the hole is punched to accept the ground tabs from the can, their are more like a copy of the diamond shaped mounting plates that would be riveted onto the chassis. They also have the same issue in that you have to remove the old can from the chassis, as you may or may not have to do with restuffing, along with disconnecting the wiring under the chassis.
Regards
Arran