Repair damage from blowout?

If it's the flexible fabric that looks similar to a tarp, you can buy that from many sources and is called Darco. Use Scrim Shield tape at the seams. I bought a short length of the tape at an RV dealer to keep in our spares box which was a lot cheaper than a roll of it anywhere else.

Some have taken the opportunity after a blowout to do something better for protecting the wheel well area. Even saw some pics of someone who used alum. diamond plate.

Oh, and don't forget to upgrade to LT tires now too, lol! :)