I've had really good luck with MIA Jazz necks, vintage and reissue, and MIJ and MIM bodies to keep the costs down. If you're patient, there's plenty of stuff that comes up on TB, necks, bodies, trons, hardware, everything a P-body J-neck growing boy needs! My avatar is a jade pearl Am Std P from Strotosphere, Geddy MIJ neck (now it has an avri '75, looks the same but isn't as thin), lace alumitone pickup and standard pick guard and hardware. Sounds killer. plays great, love it. I have 4 other P-body J-neck basses with unique characteristics; BEAD, 2 J pickups, Fralin P/J pickups, etc. My main player is a 1976 Jazz neck on an American special body with a Fralin P/J set 10% overwound. Got a great fender tone with a little more umph, plays great, fast thin narrow neck and sits on my body like an old comfy sweatshirt. It's fun if you like tinkering!