Damaged B&W 6 1/2

I purchased a pair of CDM 2SEs (ca 1997 version of the current CM 5) from eBay last week and one driver has developed a nasty buzz. It's a 6 1/2" Kevlar driver with the pointy dust-cap/diffraction thingy that seemingly every B&W speaker has come with ever since.

The part number is ZZ11177. Sadly, this part is out of stock and out of production. When I wrote to B&W for a replacement suggestion, I was told that there was no equivalent, and given suggestions for cone repair shops around the states.

My first question is: Is there anyone on the west coast (or here on audiogon) that can walk me through a repair or repair this for me?

And secondly, kind of an academic question: B&W had 3 speakers in the CDM SE line and several others - all having 6 1/2" kevlar drivers. And if their parts guide is correct, *none* of the speakers shared the same driver.

It's nice to think that each product was so carefully thought out that it required its own set of custom drivers, but from a business standpoint, why make a different driver for your $800 speakers (CDM 2SEs) than for your $1200 (CDM 1SE) speakers? And in 5 or 6 different speakers, NONE of the mid/woofers have the same electrical properties? This is a real head scratcher for me.

In any case, I'd appreciate advice/help/being pointed in the right direction for repair. Thank you!