[Arran]

For the buffer cap, or hash suppression capacitor, in the vibrator supply I don't know what the capacitive value was in this particular case but they do need to be in the killivolt range. I think that they are supposed to be something like .025 uf or something like that, just look at some 6 volt car radio supplies to get an idea. I was told that ceramic caps are a bad idea in this application and that film caps are better, however if you can't find a 1 KV cap use a pair of 630 volt ones in series which will give you 1260 Volts.
Regards
Arran