Are there replacement woofers for Infinity RS1b's

I have a pair of Infinity RS1b's. I now have blown my second woofer. It's the voice coil and this one is not locked up like the one before.. So it might be repairable. Mine are the ones with the black center cap and concave rubber surrounds. Finding these is tough. I'm just wondering if age is taking it's toll and there was a woofer out there that I could replace all 12 of them with and then have a woofer that has replacements or parts available. I keep looking for somebody that has a pair of these with beat up cabinets for sale to buy for extra woofers, but I think there's many others looking as well. I love these speakers and don't want to part with them. They also have the modified high & mid towers that Michael Marks sells and they sound awsome. If he only made a modified bass tower!