After reading the "favorite Youtuber" tread, I thought this could also be a good tread to pull together knowledge. Please list your favorite company that makes custom body / necks for either builds or replacements. I've never bought from them, but Warmoth is an example. Extra points for small businesses... they were hit hard by covid.
I have had great success with USA Custom. I have a very light and resonant P bass body and a fantastic jazz neck from them (on two separate basses). Apparently they are part of MJT now, but still separate? Not sure how that works. Home - USA Custom Guitars