[Arran]

The cheapest place to buy capacitors? I gather you mean replacements for paper capacitors? I would say WJOE for most of the common axial lead ones, at least up to .5 uf 630 volts, for anything larger I would say Mouser or Digikey, sometimes Allied. With WJOE the more you buy the more you save per unit, I just stocked up with parts from his place. One thing I should mention though, the finish quality of the WJOE caps isn't as good as lets say an Illinois or Mallory cap, with wrinkled labels and so forth, but they test fine up to full rated voltage. One other way to save money is to get radial lead versions of a given size, axial types are better for restuffing tubular paper caps though, with Philco Bakelite blocks it doesn't matter.
Regards
Arran