Thanks for the tip, but no such luck. They are long gone. In the meantime, I gently pushed the cone in and out while shifting it slightly out of center and found a spot where it doesn't rub. I rotated the woofer in the cabinet so that part is at the bottom and it seems to be playing without rubbing for now (in other words, gravity seems to be holding the cone in a position where the voice coil doesn't rub). I'm not confident this is going to last very long, but hopefully it will hold long enough for me to find a replacement.
So ... to anyone reading, I'm still very much in the market for a replacement!