This:Hook & loop pads do wear out after considerable use. If you can't get a replacement, you can sand off the remaining hooks and use one of the peel & stick to hook & loop conversion kits. I recently did this to a sander that wouldn't hold the hook & loop paper well any longer. It worked great and my sander works like new again.
I have replaced three hook pads (that I can recall, maybe more) on various sanders with this exact Gator kit. It works famously, and you will have half a tube of pretty good contact adhesive left over!