I could be wrong, but I don't think there was any use of the Quadraphonic pickup on the Europe 72 tour. As far as I understood, that pickup was mostly utilized with the "wall of sound" system that they used to tour around the US, with that pickup making it possible to give each string it's own giant column of speakers. My guess is that Europe 72 (given their limitations in terms of how much gear that could bring with them) was likely "just" the two "normal" Alembic pickups, in combination with the filter electronics, being used through one of his modified Fender Showman heads.
My 3 main basses -- 1970 Guild Starfire with Bisonics and filter electronics, 1970 Guild M-85 all stock/passive with Bisonics, and a 1962 Gibson EB-0 with Bartolini and Joe Barden pickups and filter electronics -- all do a good job at hitting Phil tones when played through an amp with a Fender-inspired tone stack. So you don't NEED Bisonics (proven by the EB-0) and you don't NEED a filter preamp (proven by the M-85).
If you're just looking to get a ball-park tone in a live setting but also within a reasonable budget, I would recommend keeping an eye out for a Korean reissue Starfire bass (even though the reissue Bisonics aren't very faithful reproductions, they are nice articulate single coils in their own right), stringing it up with flatwounds, and playing through a Fender-inspired amp; a Yamaha PB-1 preamp is an excellent great budget option there. Then play with a heavy pick over the neck pickup and work in a good amount of staccato notes and syncopation. After all of that, if you still have a couple hundred bucks left over, get a set of JTEX Distiller filters to drop in your bass. They're my favorite resonant filter preamp and what I've settled on after trying multiple ACG/JohnEast and Alembic preamps over the years.
Obviously this is very simplified answer, but it will get you into some clear Phil-esque sounds for a live performance context, without requiring thousands and thousands of dollars to be invested.