I had an additional thought. If you wear through the rubber coating you could literally replace it with shrink wrap.

As far as the arrow staying on the shelf. The pro series rest come with a foam arrow holder but I didn't particularly care for it. I have a little plastic one made by nap that holds it snug (upside down even) and dosn't make any contact with the arrow when I shoot. I'm also shooting an offest fletching and have had no problems yet. The shop in Wells I had mentioned in an earlier post carries them although I couldn't find one on any of the major online archery stores.