Does anybody know where i can get the ipod cable that connects and ipod to a 2006 scion xB?

my scion xb came with two connections where you can plug your ipod too. One says aux. and the other says ipod. i cant seem to find the cable that connects it to the ipod slot. Does anybody know where i can find this cable? I went to best buy and they hadnt even heard of it. Please help