Funny how people are using a dremel to widen the channel on the Powerfly holder, but the Edge holder channels widened just by skating on them for a year. 😬
Since the liners are removable, you should be able to stitch new fabric over top of the worn areas. I would also recommend using some denier nylon in the high wear areas.
https://www.amazon.com/Black-Denier-Cordura-Nylon-Fabric/dp/B00I80QH3S