oddly enough, if you have a "oh ****! " box... grab the eternabond... that stuff works great for awning repair. My buddy has had that stuff on there for a few years... that stuff will outlast the camper now... lol
If you get the awning tape. I'd apply to both sided, and if you are good with a needle and thread (fishing line) light weight. I'd sew a good over/under/thru.. tie it together at the tear and apply the tape on both sides again... like a suture.
$25 in parts.. a little time, will save you 3-400 for a new awning