IME, you don’t need to be that special. I used pieces of a nylon liner cut from an old jacket for several years, until I misplaced the piece. Glued, or laminated in place with Liqui-Sole. Those repairs too tended to last the natural life of the tire.
Last repairs have been made using non-woven. Can’t tell yet if that too will last the natural life of the tire, but it’s looking promising.