I think, only on a Harley Bat Wing fairing mounted on a std (or tourer, but the tourer already comes with a nice shield). Nick in FL has the complete Harley Road Glide fairing (and shield) on his Valk.
The thing is, for just a shield, you need shield mounts to fit a Honda Valk front end, and I believe the top fork diameter (45mm) for them is wider than (all or most) Harleys.
You get some proper mounts (like from Memphis Shades), you might be able to cobble up any old shield to them (with a 9" headlight cutout). After drilling holes and cutting plastic, it will probably look ..... poorly.
Cardboard can be made to work.... but with a suspect longevity.

