Grips were $80.00 not including shipping.
I don't think I can post a link to the place I bought them from since they're not sponsors of this site.
I'll just say "google Twisted Throttle"
The fairing in my opinion doesn't divert a whole lot of air from the hands. It's too narrow. The only bike I know of that does that is the deceased Buell 1125R with the wide fairing.
The Honda does direct the air around the hands wayyy better than a naked bike though
Plus when you consider how much wind is kept off your torso, that helps keep the hands warmer just by having your core warmer.
I don't think hand guards would clear the fairing/shield but I could be wrong. At the very least I imagine hand guards could be trimmed to clear it. I've seen a few folks do something like that on their BMW F800STs.