You won't be able to change the cord color though. So if you have the internals from a camo...then you will be stuck with an olive green cord. Black filco= black cord, white filco=white cord, etc.
I haven't opened any of my Filcos (yet), but doesn't the USB cable connect to the bottom of the PCB using a plastic connector? I wouldn't think the cable is soldered directly to the PCB. You could just swap the cables there.
In fact, I saw the connector in Feng's picture of the acrylic TKL case (I hope Feng doesn't mind me using his image):Show Image(http://geekhack.org/attachment.php?attachmentid=48588&d=1334842541)
Dirty work is done, thanks to Ripster's guide! Here are your Brown MJ2 Filco guts, Awful:
(Attachment) 50188[/ATTACH]
(Attachment) 50189[/ATTACH]