What model is your HR, (Imperial, Endeavor, Ambassador etc). It might make a difference.
Last year I inspected my airbags, 2002 Monaco Windsor, and did not find any problems but I decided to buy a couple spares just in case.
The first place I ordered from indicated they had them in stock but after placing order I got an email that said it was ~3 month lead time. I canceled that order.
I then ordered two from Truck & Trailer. Got them in ~4 days. I just wrapped them in plastic and out them back in the BR closet. Not much weight. I carry the tools to replace in necessary, I'm sure it would be harder to do on the road versus in my garage but I'm OK with that.
2002 Monaco Windsor 38 PKD Cummins ISC 350 8.3L
2005 Jeep Grand Cherokee w/5.7 Hemi