I haven't found the exact right one, but if you Google Images for: Survival Lighter, Windproof Lighter, Windproof Butane Lighter, ... Some of them look VERY much like the FTL Key. Of course, minus the blue light bars. Am I on to something here?
No, I don't think so... The original screen-used prop (which I own) is a completely fabricated item, made from CNC cut blocks of aluminum just like the ones Phillip is making now. The only 'found pieces' in it are the two light sticks.