These folks had the windshield for my 84 Classic, I'm not sure if the Argosy is the same RV Glass -- Windshields and Side Glass -- Duncan Systems
Common chassis repairs to the Classic Motorhomes chassis include front end parts, rear air bags, brake master cylinder, exhaust, cooling system, gauges, starter, alternator, etc. I don't know if these will be any easier to get/less expensive in the US.
If you want others to be happy, practice compassion.
If you want to be happy, practice compassion - The Dalai Lama
1984 310 Limited Motorhome
Courtesy Parking (W/S/E/Wi-Fi) on I-5 in Northern California, 70 miles from Oregon border