Not sure what Airstream is using as a door handle for the 2013 but that year SOBs were using a handle that is the subject of a Federal Recall. If you ask the dealer they will try and sell the replacement but they are free.
This will get you started.
I have replaced on on a friend's Winnebago.
More info search
RV trailer door handle recall
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