Looking for third member refurbishing in the Maryland area

I have a 741 case that I would like to have refreshed with 3.23 gears and some sort of sure grip? I am in the Maryland area and would like to use my existing case. I would give up my case as a core if somebody local has a case already built with new internals set up with a 3.23 gears and a sure grip. I need a 30 spline carrier and I have the green bearings. If somebody can recommend somebody to provide this service I would appreciate it.