To be clear, they do offer a paint option, but it is more expensive and it's only available for the current model years paint. (You can have it in any color as long as it's black)
Again, I don't doubt the HE fairing is better, it's obviously a well through out aerodynamic solution and yes that takes time and money to develop.
What I'm saying is that $1400 is a lot of money for a marginal range difference, and for myself I can't justify it. Especially since I already have a zero windscreen. If you have the money to throw at this kind of stuff that's awesome, but for me it defeats the purpose of an economic commuter.
Aesthetics is an interesting point. I do think the fairing looks good, but it also is at odds with other accessories. For instance, the HE fairing would look really odd with handguards, while the zero windshield does not.
I do think it would be smart for Zero to license the HD fairing, but also it would just end up being more expensive for the end user if now two companies need to profit from it.