I have one for sale, pm me if you are interested.

Thanks for the offer but I got one about 10 mins ago!

My dog bone kit arrived this morning thanks Luke 

I've just stripped mine out this afternoon 


The spacer is 15mm outside diameter and 4mm thick and is made from stainless I think as its not magnetic!


Check carefully inside the exhaust because the first time I stripped mine out I had the same thing and thought it was missing but on closer inspection I found it inside. It had dropped off when I pulled the valve out.


After I had found it I struggled a bit to get it back and that is how I know its not magnetic!


If you don't find it I would check the diagram again I think its the bush that's £35 not the spacer!


Good luck!