Can recommend the Givi D405ST
However I have tweaked it a bit as follows:
Have added an Aero Trim from HERE
The screen is on the last but one hole from the top.
The screen is also mounted on:
1 tap washer between the screen and mounting struts on the top bolts,
and 3 tap washers on the bottom bolts.
This kicks the bottom of the screen forward, letting a bit more air under the screen and sort of flattens the screen a bit.
Has the effect of reducing the buffeting
and give a bit better clearance to the Bark Busters I have fitted. as the BB hitting the screen is an MoT failure