Looking for Longer Sound Blaster Audigy AD_Link cable?

The AD_Link cable that comes with the Sound Blaster Audigy 4 is one part firewire and one part something else. I need to find out what that other cable is. The cable that came with it is not long enough and Create Labs "can't" make a longer one for me or provide me with some sort of coupler to connect two together. Does anyone know what kind of cable this is and/or where I can find a longer one or a coupler. Thanks.