Anyone know of a source for the various cylinders used in gas caps, luggage, etc? I've got one from my 85 FZ750 that had been drilled out and I need a replacement. Normally I would just buy a new gas cap, but this is one of the 1st 500 built and it has a different setup than the rest - can't find a cap that fits right. Figure there has to be some place online where I can just compare pictures