IMO...
1) Put a Duncan Hot Stack (or other humbucking) J pup in the bridge position of your existing bass, or
2) Buy an extra pickguard and put a SCPB in the neck position on your existing bass, or
3) Find a Squier
P Bass Special and upgrade the pups, or
3) Buy an SX P bass from
Rondo and mod accordingly with a SCPB in whatever position(s) you want.
Just my 2 cents, YMMV, etc., etc..