[morzh]

Yes these 50s radios were only using miniature tubes and those are not really expensive, I can bet you 90% chance there are ECC83 in amps and EL84 in the output. In soviet radios it was almost universal solution.

And also these 50s radios may not necessarily need full recapping only needing the electrolytics changed (well, this is an inherent problem with the electrolytics), and other than that possibly cleaning the volume/tone control pots. Well, of course things like cleaning switches and refitting the dial cord, but those are not electrical.
What I am driving at, if the radio did not smoke you might not need the sch at all.

Last thing, these radios often used the selenium pack rectifiers which I saw sold even in 80s in stores as spare parts. Those can be replaced with diode bridges and meybe some resistances to compensate for selenium bridge losses.