I did run a Pachmeyer pad until it fell apart, the day before a hunting trip. I didn’t even notice it was falling apart until I picked the gun up out of the safe and half the pad stayed behind.

If it says Winchester on it, you can likely get a replacement. A pad isn’t a forever item, they do go away, and any repair to a hard pad is likely to be quite temporary, at best, and unsatisfactory in actual use.

Good luck, at any rate.

Best,
Ted