I was looking around for yet another velcro cinch strap to secure the awning upright while underway. The small chessy ones you get at camping world or REI/Cabela's are rubbish as the two pieces heat welded together. I have had to replace them several times.
The secure cable ties store has some Nylon webbing D-ring velcro cinch straps. You can get them in a variety pack of differing lengths. Many other cable products as well.
https://www.securecableties.com/ (https://www.securecableties.com/heavy-duty-cinch-straps77)