You should be able to google for it. Cheap it usually is (well not really cheap)

Actually [link|http://www.logicalplus.com/|Logical Plus] sells em. Hicksville, NY. (or at least did)

BUt here is the [link|http://castle.pricewatch.com/search/searchmc.idq?cr=DB15+&qc=%22DB15%22*+AND+%40ctd+213&i=213&ct=Computer&c=Cables&mi=N&m=N|Pricewatch Page] for the stuff you need to be looking for.

BTW, go for the $10+ models... Newegg has quite a few Gooduns.