ProAc Response 2 woofer rot - need some advice

I've got a pair of 15 year old ProAc Response 2s that have the dreaded woofer foam rot, could I get some recommendations on what to do? Is there someone that can repair these woofers?

The last time I inquired with the ProAc rep in the US, he quoted me $500 each for new woofers. There most be a better way, thanks for any suggestions.