Kind of depends on what kind of tone you are going for.
1: Seymour Duncan Vintage for a classic style tone, should be able to get them in a set.
2: Seymour Duncan Hot/Quarter Lb pickups. For a more modern aggressive sound you can get a set of the Hot pickups or the Quarter Pounds for higher output. Also some have combined a Hot P-Bass with a Quarter Lb Jazz to try and match outputs better.
3: What I would do, get a Fender Original '62 P-bass pickup and a properly sized Fender Vintage Noiseless Jazz pickup.
Fender Jazz Bass Club # 985, Official Bassman Club #84
Fender Active Jazz Bass, BCG P-Bass, Fender Bassman 135 + 215 Cab, BFM Jack 210