Check out this company.
https://www.toughtopawnings.com/prod...31650252423238
We're going to replace our 9 year old fabric with one from them, in a few weeks. Put in a little info, answer some questions they ask particular to your brand of awning, and be sure to measure the fabric only, per their instructions, and you'll get a price.
The fabric they sell is much better than anything I've researched out there. I have no affiliation to them, other than being a customer as soon as I get our TT uncovered.
There are several videos on replacing the fabric yourself. Watch them, and when the time comes recruit a couple of friends or relatives to give you a hand, and you can do it yourself. It's not a difficult upgrade to do. I'll be doing ours here in the driveway.