CreativeAudioLabs Redeemer Circuit. WOW!!!
Yah, that's kinda what I was looking for but just the bare board and without the marketing "hype". I actually want three so I can put them right on the pickup outputs before the controls and the third to drive the jack - so it gets a bit pricey to buy three of these

. I'm starting to remember the circuit I used years ago, it used a quad op-amp to give three buffers plus the fourth used as ground reference to make it all DC coupled (flat to 0 Hz) with no caps in the signal paths

. I'll try to draw it up and post it

.