I have an older 2p gauge mossberg 500 with the wood stock and the recoil pad has hardened with its age. Is there a product I can soak the recoil pad in to soften it back to original or is it better to replace with a grind to fit pad? I can't seem to find a direct fit replacement for the wood stock 20 gauge so that's why I'm looking at the other 2 options. Thanks!