I see theres a whole lot of EXT connectors at Richard Taylor's GP2x Merchandise page. If you asked nicely he could probably send you a plain cable. Or you could just order whichever custom one you want.
Thanks for the replies im not gonig to use it for my gp2x its for my samsung yh-920 mp3 player it fits perfect so i want to make a usb data transfer cable for it hope i can get it to work lol