For true JPJ vibe - in the pre-Presence era - you have really 3 choices: A 60s MIM Jazz, the pricey 64 Ri, or a Bass V. He really did not use a stack knob, but you could in theory buy a 62 ri and swap the control plate for the later version. At any rate, the MIM is a great bass, but does need a competent set up job. All the mim come with bad action and sometimes bad intonation and fret finish. Not so big a deal really considering the savings. The 64 RI is steep for essentially a 62ri with the later plate and a bit more attention. He did use the Bass V regularly in the early 70s monster touring phase. For completists only. I don't recall him using a P except for odd photos - not part of the early vibe.