Givi has a range of universal screens for naked bikes, mounted via the headlight bracket.
GS 240A - Universal screen for naked bikes, smoked, 33 x 36.5cm
Requires universal fitting kit GS A240A, sold separately.
GS A210 - Universal screen, smoked, 36.5 x 35cm, including fitting kit
GS A201 - Universal screen, smoked, 29.5 x 31cm (requires fitting kit)