The following members own vintage Airstreams and live in SLC:
lbrandt
BDH
youngpeck
This member is in SLC, but has a more recent model:
spenfolder
Dan Sheridan, member name "
sheridan," lives north of SLC, but lists himself as a trailer inspector. Dan has refurbed an absolutely awesome vintage
Caravel.
AVDESIGN lives in Sandy (just south of SLC) and is listed as an inspector. AVDESIGN has a recent model Airstream.
All of these members have been active on the forums since the beginning of 2014. I recommend contacting the owners of the vintage models first.
Zep