We have the same problem with ours, same make/model and everything.  We can't complain, we've used it for almost 10 years now.  The best way to get a belt for this machine is by measuring it and finding a matching belt at the hardware store.  From what I understand, it is the same as a kind of belt for a miter saw.  Hope this helps.
                 Arinia
                
 December 2007