I got mine from a samsung data cable, i think they are pretty much all the same.
This option's probably the most costly, though, so if you can find the connectors on their own, that would be the best. -- go to: this link- This company makes them.
I'm not too sure if standard mobile phone data cables have all the necessary pins connected, but as spudpeel
said it would work... you might have a look at ebay, data cables for NEC21i have the right connector and
cost like 10 euro.