I think you might be referring to the CA-53. It is sold by almost any vendor that sells accessories for Nokia phones. Nokia stores (including the website), Cingular stores (including the website), and eBay all carry them. Of course, eBay is significantly less expensive. If you decide to go the eBay route, make sure you search for "OEM ca-53" to ensure that the cables returned by the search are actually made by Nokia. There are some cheap knockoffs out there that are unreliable at best.
