I contacted a company that makes canvas rock guards and here is the reply.
"Good Morning Steve,
Thank you for your inquiry.
We do manufacture the padded window guards for the Argosy Airstream. We've been told that all years of the Argosy are the same, which is good because we only have one pattern.
We use Sunbrella fabric on the front and back of the cover. The inside has a 1/2" dense foam. The belief is that the 1/2" dense foam with disperse the impact of a stone that may come in contact with the window while travelling. We cannot however make any guarantees because there are too many variables at hand. With that being said, we've also never had anyone contact us and tell us that the window covers didn't work. We install the turnbuckle grommets in each of the covers and supply you with the studs to be installed on the trailer. The covers are larger than the window frame so as to not interfere with the window glass.
You can go to the Sunbrella website to view the colours. You may choose any 46" wide solid colour. We recommend choosing a darker colour as very light colours will get dirty very quickly. Please see the Sunbrella link:
The cost for a pair of padded window covers will cost $395.00.
The shipping will cost $50.00. We send them by the Postal Service as that is the most economical way to ship them. It usually takes about 7 - 10 days.
We will require a Visa or MasterCard number at the time of order. We will need a deposit before we begin. Once the order is complete, we will use the same card number and process the rest of the order. Please contact your credit card company and let them know you will be making two telephone transactions to a Canadian company.
Hornsby Canvas & Tarpaulin Ltd.
I plan to order a set tomorrow if they are open. I will let you know how they turn out if you would like.