I just wanted to update this thread. I'm in the US and converting a Dunstall Honda back to stock configuration. I have some choices to make about fenders and tail light. I always liked the look of the UK tail light and black bracket. I happened to come across one cheaply. I took a chance that the US K2-K6 rear fender would have the same bolt spacing as the UK bracket. It does. This is an original K2 fender with the UK bracket bolted on.
I'm still waiting for the oval tail light to get here but it should bolt up no problem.
Scott