I think your best bet would be to find replacement drivers from partsexpress.com.
On the surface these look like a good fit but a little pricey http://www.parts-exp...peaker--264-919
You could try the cheaper option of these http://www.parts-exp...ielded--290-352
$48/each or $15/each. At $96/pair, you might be better off buying a replacement sub on eBay for parts.
Edit: Found foam ring repair kit on eBay for $27, try that out? http://www.ebay.com/...=item2321ce736b
Edited by justin_tx_16, 30 November 2013 - 04:39 PM.