I got new awning fabric earlier this year from these people
www.dyersonline.com. The cost was $199.00 if I remember correctly, and the shipping was free? It came straight from Dometic to me rolled up in a tube about 8 feet long so there were no creases in the fabric. Shipping was fast too, about 2 days. My wife and I removed the awning frame and changed the fabric ourselves, then I had a friend come over and help us put the assembly back on the trailer. Took about 2 hours total, and part of that time was spent drinking cold beer. I do suggest watching the youtube video before starting, if you are doing it yourself.