Does any know if we can get “blanks” I would love to be able to remove a couple of cards (would save some battery) and keep them in my briefcase with my other ones not in use, but for some reason I am worried about the docking bay and would feel better with a blank/filler. I realize that the docking bay usb is recessed and in theory more protected than any other one on the side, but still would like to fill the gap when not using it.