I'd say your best option is cutting down a stocker (cost-effective, anyway).
I have a HJC FS-15 helmet, which is real quiet on my Monster, but quite noisy on my 14, even with the CalSci shorty (and earplugs). I bought a spare stock screen to really hack down and try, just haven't done it yet. Flipside is that with my CalSci large, it's a quiet ride again (because it blocks enough wind from my helmet), but sucks in the summer for heat (I don't recall the last time I even had the large screen on the bike).
It's all a really frustrating art to find that right configuration for you... your riding position, helmet choice, etc, etc...