SS9 has the most need for aftermarket windshield. Eva and Ego have fairings with some windsheild.
This maker of windshields with trademark NACA duct vents known and known for their aerodynamic theories, based in Missouri now, rather than Sacramento, they have expressed interest in making a model for the Energica, but have yet to see one. Closest dealer is in Texas.
Maker of adjustable windshield "systems", based in Florida, they have expressed an interest in making a model for Energicas, and Rickman Flash has agreed to take his SS9 for a fitting.
Universal mount windshields for 7/8" 22mm handlebars, such as Givi A660, should fit SS9.