[Arran]

 There is another alternative if you don't want to deal with the vibrator, you can bypass the vibrator supply, leaving it intact of course, build a normal mains operated power supply to generate the same high voltage that the vibrator supply produced, and feed it into the B+ circuitry of the radio. Then you will only have to deal with powering the tube heaters which are likely in a series parallel arrangement, junk computer printers and stereo amps may offer a source of a 32 (or close enough) volt transformer for this. 
Regards
Arran