Class A Motorhome windshields are custom fabricated for each coach body. So, because of the custom nature of the product, they are one of the few things we don't carry in the RV aftermarket world.
There is one major manufacturer of Class A windshields, a company called Coach Glass. They produce the windshields for many of the major motorhome manufacturers, as well as for buses, fire trucks, and even rail cars. There is a good chance they will have the glass configuration for your coach available.
They can be reached at 800-714-7171 or at Coach Glass Online
If you are looking for an RV Windshield cover to keep the sun out or for privacy, RV Part Shop has those available for purchase.
Another RV windshield-related product we get asked about a lot is RV windshield curtains. Those are not offered by aftermarket retailers either. If you have an older RV and need replacement curtains, our recommendation is to find a local curtain maker to fabricate them for you. You will have the benefit of getting the color and pattern you want, and it will be more cost-effective than getting them from the OEM RV manufacturer (if that is even possible.)