Just search on ebay using something like this:
"30 Pin Dock Connector Male to Female Extender Adapter for iPhone 4S 4G 3GS iPod"
Buy it now options...
Ranges from $1 to $7 and up so find the best seller with the cheapest price. i would not spend more than $2 for these shipped tbh. haha
Sadly the Philippine ebay seller i got these from no longer sells them, cuz he shipped them fast and got them in pretty quick.
edit: Oh back to the X1 so the dac section of these can't be used with your computer like the FiiO E17, X3 or X5 correct??? That was what i got outta' it last time i read up on it. Kinda sucks if true but guess it makes sense on FiiO part strategy wise so it won't kill the sales of the X3s but still....... seems like a waste to not have that option/ optimize it tbh.
Edited by sfwalcer - 8/30/14 at 2:16pm