If Baltimore is not too far from you, Phil Jacoby http://www.philtone.com
built both of these for me, the on the left from planks of wood, the one on the right using a Warmoth body and neck, and all of the electronics on both, including UGBs and OBELs. Waldo personally helped us navigate some of the rockier wiring shoals for which we remain extremely grateful. Since building these, Phil has installed UGBs and OBELs on others' axes, too.
Disclaimers: I'm happy to share whatever relevant gear knowledge or experience I have. Genuflection/payment/proof of worthiness neither sought nor accepted. I don't design, build, market, sell or endorse for pay any new music product or service. I occasionally sell personal used gear. I am an unpaid endorser of SoundScaper Productions and Godfrey Daniels Guitarworks.