Hi GH0ZTKID21, I am in PA, formerly WV and sorry but I do not have a source for you. Wish I did!
I had 3 actual professional carpenters look at my van build drawings and say 'Oh yes I would take that job it would be no problem to complete in several days' (I was supplying materials, tracked down fasteners etc) However, came time to schedule and none would commit. In the meantime I spent hours and days talking to mechanics, body shops, truck centers, a few RV places about seating, etc which is what I needed to start with.
In the end I decided on nothing fancy- being my first van and wanting to work out of it and transport bikes in it. Have met all kinds of interesting people- but same as when I owned a couple of houses, it was very difficult to find tradesmen to take on small jobs- custom or not. So I am VERY interested in learning how your project comes to fruition- good luck!
2011 V10 E350 XLT SD Quigley/AOR (RIP'd)