ESS AMT-1C woofer rubber surround source?

Hello, are there currently rubber (not foam) replacements available for ESS AMT-1C woofer surrounds? Could you provide some details?

I'd like to know if any sellers are located in Europe, ideally.

Thank you for your help.
 
Bigskyaudio, the original passive flat radiator surrounds were made of foam, and this should be the same in your case. Only the front woofer surrounds are made of rubber. Over time, these rubber surrounds will develop slits, leading to distortion.
 
After demonstrating the issue using large Japanese drums recording to a friend, it became apparent that the woofer distortion wasn't caused by the slit rubber surrounds, as I initially suspected. Later on, while inspecting the dust cap (115 mm) with light pressure, it unexpectedly came off — revealing a smaller, primary dust cap underneath, measuring 95 mm in diameter. Upon closer examination, it appears that the larger dust cap had been poorly re-glued at some point in the past. I did some research, but this double dust cap configuration doesn’t seem to be documented anywhere.
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