I'm in need of one lock tumbler for my top box as it mysteriously vanished on the way to work. The only part I can find is a full kit of 3, which includes three tumblers and two keys, part 592.1.068.1A. I know how to re-code them to fit different keys, I just need one tumbler and that's it. Does anyone know of any for sale? Or perhaps, are the seat locks the same tumblers, or even the fuel cap lock?