The only thing that is unique to an Airstream is the body. All appliances and fixtures are off the self RV items. With that in mind any good RV shop should be able to service your trailer.
WBCCI 12156 AIR 3144 WACHUNG TAC NJ6
2004 Excursion 4x4
1991 34 ft. Excella +220,000 miles, new laminated flooring, new upholstery, new 3200 lbs axles