Best folks in BR to retube an amp?

Correct, I don't do amps, I'm plenty busy enough with fretted instruments alone haha, but thanks for the mention.

Kenny at Red Stick and Mike Kennedy at Riverfront are the first two names that come to mind. I believe Live Music on Florida Boulevard still services amps in house but I haven't been there in a long time.

Is your amp an actual 1967 piece or a reissue? I ask because if the amp is 50 years old, get your amp tech to check and possibly replace the filter caps (capacitors) while he has it. They go bad over time, they leak. I'm not the tech head on amps but I know bad filter caps detrimentally affect tone, noise overall performance, other components' lifespans, even player safety, on older amps.

It goes without saying too, if it's a vintage amp with a two-prong AC cord, have it converted to a modern, grounded three-prong cable. This is advised for all vintage amps being used today.

I think Riverfront only services actual vintage tweed, brown-, black- and silverface Fender amps - I don't think they do printed circuit board-construction reissues. If your amp is the latter - a modern reissue - Kenny at Red Stick will take care of you.