These cables are available on ebay now just seach for sony sava the seller is eeattom They look to be good quality stuff.

you'll have to get this from sony. call their parts center. give model and description. they should be able to look it up in the s/m. call: Call 1-800-488-SONY (7669)

I bought mine from Sony.com its about a 6-9 pin connector and its not really that cheap but worth it.