A site where you can easily and clearly research eBay and Amazon UK smoothly.
It’s fun to try entering motorcycle models and parts in English (*’ω’*)
What I found among them was Harris F1 Suzuki XR69 GS1000 8v Exhaust System
Stainless steel with slip-on exhaust pipes in a 4-2-1 configuration and an aluminum silencer.
Pretty cool, but it looks like it can only be used as a base…
When you search for Kawasaki KZ1000 MK2, you get results like this.
You might find lots of hard-to-get items in Japan.
Try patrolling around and checking out various things~
