[Arran]

Murf;
  This looks like a suitable replacement, it even has the taps on the secondary like the Hammond universal transformers have, but are more reasonable(ish) priced. That is if you want to go new, if used look for a transformer out of a unit that uses #42s, 6V6s, 6L6S, or 6BQ5s, or NOS look on fleabay or see about the Play Things of the Past guy.
https://www.tubesandmore.com/products/tr...output-8-w

Disregard what I said about needing a 12 Watt unit in the P.M, the service info actually rates this set at 3.5 Watts which surprised me for a set with P-P outputs, most of the ones I have with P-P 6F6s are at least rated at 5 Watts, it doesn't really make sense to me since they are running the tubes with 265 Volts on the plate and screens, but none the less an 8 Watt transformer should be more then sufficient.
Regards
Arran