I bought one just like this from this seller but I don't see one of his for the FZ6 up online. Try sending him an email and ask about the FZ6. He has these all custom bent for different bikes.
the gas cap mount is great and works awesome if you have a camera that mounts that way, but if you have a handle bar mount type camera then a few people mount them with zip ties to the radiator support and it works awesome.