http://www.tymphany.com/products_ScanSpeak.html
This is the company that makes the Scanspeak D210/8513 tweeter found in your speakers, on the link how to buy and under OEM sales theres some phone numbers, maybe someone there can help you.
heres the pic showing part number
[IMG]http://i34.photobucket.com/albums/d106/mikeybc/D2010_l.gif[/IMG]