andover85 does as well. You'd have to source your own bolt/sled combo but he does great machine work.
Check out his stuff: Feather Weight Machining
Paintball changed for me twice in my life, when a close friend introduced me to pump play and cockers and when I went from woodsball with Tippmanns to tournament ball with my Bob Long Rapper and AKA Viking on the UW-Stout Team. I'm a better player thanks to both occurrences.