Hey inditx, If you must have one of these exhausts I think you are better off buying one from Webike. I found their shipping was inexpensive, fast and reliable. I won't sell it if I gotta package and ship it. Would be different if you could just drive here and pick it up. Good luck with your project.
There were pictures of a few early CB1100, in 2013 or 2014 I think, which really stuck out. All black frame, fenders, tank, seat, wheels AND ... a black engine. Was it all OEM or custom, I am no longer sure. But if anybody has a bike like this please post a few pictures (again ?).
This exhaust and that bike would be and would have been my fav always by far.