Note that the Airstream on line 2003 Classic parts manual states the aluminum wheel is Airstream part number 400935 and the steel spare wheel is Airstream part number 410822-150. Those are the actual 2003 part numbers and might have been superseded.
WBCCI Life Member 5123, AIR 70341, 4CU, WD9EMC
TV - 2012 Dodge 2500 4x4 Cummins HO, automatic, Centramatics, Kelderman level ride airbag suspension, bed shell
2014 31' Classic model 30 twin beds, 50 amp service, 900 watt solar system, Centramatics, Dill TPMS, disc brakes, 16" tires & wheels