If you are still looking for the Skybound Adapter, I would check out ebay.  I found the Skybound Adapter at The Aviation Warehouse store on ebay.  Here is the link directly to the Skybound Adapter:

http://cgi.ebay.com/ebaymotors/Jeppesen-Skybound-Adapter-DSKYUS41_W0QQcmdZViewItemQQcategoryZ90975QQihZ015QQitemZ250150133409QQtcZphoto