I have a pair of Infinity Kappa 9s and have had them for over 10 years. For those of you who don't know them, the are almost six feet tall and have seven drivers; five that face forward and two that face rearward. Two of the seven drivers are 12" woofers and there lies the problem. I was getting them ready for the movers and I removed the grill and noticed how dirty the rubber gasket between the cone and frame was and when I tried to clean it, it crumbled into dust (shades of "Andromeda Strain"). I was crestfallen. Before I touch the others and have them crumble, is there anyway to rejuvenate the rubber? Is the one woofer toast? Can I just replace it with another 12" woofer? How much would just a thing cost? I love these speakers and see nothing wrong with the mids and tweeters.