I don't want to re-post a subject but I think that the discussion concern you gentlemen.
I just bought a black Triumph Thruxton 2009.
But the it miss the screw and the spring that fix the mirror arm in is adaptor.
See here, it's number 8 and 9.
According to what I found, this image is for a Thrux 2008. Mirror are bigger on the 2009.
So where could I fine these pieces number 8 and 9 for a Triumph Thruxton 2009?
Do I really have to buy the whole mirror kit?