I don't want to threadjack, but I had a question along the same lines.
I'm doing the naked conversion this winter, and the only thing I'm hung up on is how to mount the '06 speedo. I've thought about taking off the throttle cable guide and mounting a custom bracket under the top triple where that bracket mounts.
This thread got me to thinking, though. Obviously, the N version has a bracket that mounts the speedo to the top triple (at least that's how it looks in the pictures). If that's the case, I thought I could just purchase that particular bracket to mount my speedo, thus making it easier and more like the stock FZ6N. But, in all my searching, I haven't been able to find any site that sells FZ6N parts. Does anyone have any idea where I might look?