There is another source for awning fabric. It is Tough Top Awnings. We replaced the slide toppers on our old Laredo and the awning material. It was not a hard job.
They do have videos instructing how to measure and do the replacement work.
[FONT=Verdana,Arial,Tahoma,Calibri,Geneva,sans-serif]https://www.toughtopawnings.com/[/FONT]