I am currently using Memphis Shades sport shields on my CalVin. There are a variety of shapes and heights.
Four bolts and a hex key is all I need to swap windshields to match the season or ride.
Adapting a mounting bracket for Guzzi's is always a challenge.
The Calvin was "relatively easy". I trimmed off the quick release fork slots and bolted the Memphis brackets directly to the OEM Guzzi mount.
EV's might be easier. Given some thought one may be able to use most of the Memphis trigger lock setup.

