I do not know if any would use the same mount. I have been looking at windscreens and ran across another posting which made mention of these shields which do look appealing to me since they do cover the handle grip areas.
The one mentioned for an America is mod # SS-30-17CV or SS-32-17CV. It supposedly mounts to the tubes, which sounds like a stronger mount to me.
http://www.slipstreamer.com/Product/.../cruisers.html
I am curious how well the fly-screen works for you. Just seems so small so wasnt sure how much deflection it does.