Got to agree with Kebab, screens are such a subjective thing, I changed the original for a powerbronze screen but also have a givi, which is a bit noisy, then again I don't like full face helmets as they make me claustrophobic so any screen will be noisy for me!!
You can get a 20 inch Rifle screen from the states, looks odd but may work, check out www.cartestsoftware.com/fz1 (pats motorcycle page) its a great resource for fazer1000 stuff.
Anyone tried a schuberth C3 helmet???

I had the same advisory 2 yrs ago, then nothing this year, same place!!
I am sure I read somewhere in a service manual there is 'allowable' play of 1 or 2 mm, but that may have been wishful thinking????