I've got one already and I love it. I want three more. If you have a Polk Audio EX2 12" (it's all black, with Polk Audio in white writing all around the gasket, with sort of a swirly pattern on the cone), I'll buy it. If you have more then one, sweet.
Let me know if you've got one or two you'd sell or if you know someone that is selling them cheap, or any pawn shops that selling them.