Does anyone have a part number for a locking gas cap for a '72? Last winter I went through two gas caps in two weeks because apparently someone took a liking to them. I replaced them with a locking cap that I found on the shelf at an old style parts store (no computers). So this morning I go to the gas station, go to unlock the gas cap and some punk has broken off a key inside my locking cap. Good thing I wan't too far from home. A pair of vice grips and a big screwdriver later I have the cap off. I was pretty pissed, but then realized that a new gas cap is better than a gas tank full of sugar, so a new locking cap is going on the '72 as well as the '94. The '94 is easy, but does anyone have a source and/or part number for a locking cap for the '72? My local NAPA tells me they have no listing.