The better option would be to use a passive pickup and a transparent buffer. There aren't many active pickups on the market, and most are not voiced to sound traditional.
that would be the duncan lightnin' rods; they even have the exposed alnico magnets. they sounded so "traditional" that it was a hard sell for my customers; "so it sounds just like a vintage-style passive pickup, but it costs more and i have to use a battery? why do i want that again?"
Lighnin' Rods! Yes, those are exactly what I want! Ironically I also have both a set of MEC P/J pups and a Wald Electronics TPC1 buffer sitting on the shelf doing nothing. Decisions, decisions. If it helps, this'll be going with a Mike Pope Flexcore, with an EMG Soapbar bridge pickup.
In that case, you might want to stick with EMG for the P pickup, too. Different brand active pickups might have different output impedances (one might be "more active" than another in a manner of speaking) and thus might not blend evenly. EMG has an alnico-magnet P pickup that might be more like the classic passive.
At that point you are basically using the Victor Wooten setup. That is a PAX P pickup, and a JVX Bridge pickup with a Mike Pope Flexcore 4 band Preamp. That is clip worthy: