I made my own a while ago...

Simple covered the front fairing in plastic wrap nice and tight/smooth.

mixed up some fiber glass resin, layed a couple sheets of glass down and covered in resin, smoothed it all out. Let it setup, pulled it off and trimmed to I used two of the wind screen mounting holes/screws, and the headligh mounting hole/scres on the bottom of the fairing for mounts.

Trimmed it in the shape of a number plate so it was a perfect white number plate.

Here is a pic of the bike with it on.. can't even tell.
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Charles Gallant