Ordered some of Pete Millett's high voltage regulator boards for the same amp so I can get everything quiet; a no hassle amp and I haven't really played with regulated B+ supplies all that much. This will also allow me to get away with using a single choke in the B+ and then branching off to the L/R channels. I don't feel like making complete mono supplies for this little amp, so I'm not going all-out and only using parts that I have on hand (which is a lot, so don't feel sorry for me).
Also ordered some generic PCBs for the LM317 regulator on ebay, so I don't have to breadboard them each time. Four of these will go towards the filaments of the Prologue 2.0 amp as they are all indirectly heated tubes.