If you decide not to do it yourself, there are many options: Flutot's Camera Repair and ICT Camera (both in CA), Frank Marshman (VA), Paul Ebel (WI), SKGrimes (RI) are some that come immediately to mind. Sanford Camera Repair (Mass Ave, Arlington) can do it too, I think. Also possible Zack's Camera Repair in RI. Google around, or look in the Large Format Photography Forum under CLA.