Looks like it's best to go back to the manufacturer as cable styles, lengths, connectors, etc.  are all different. 
The bottom of this link has a vendor: http://ths.gardenweb.com/forums/load/furniture/msg051129418385.html   
Another site says Douglas furniture also stands behind their own stuff.
Lots of luck - it's taken me weeks to get this far
                
 Mark
                
 November 2008