Hi, i have found you can find just about any bose cable you need on ebay. even some unused in packaging for way cheaper that getting from bose. go to ebay search "bose cables" and vawlaa!!
good luck!!
Hi ewarnick,
You could also give a call to your local service group to see if they still stock these. If you go HERE, select your country, scroll down and click on "Contact Us" you should see their phone number. Let us know if you have any other questions!
Kind Regards