Fox Racing V4 Flight Helmet
I'm not a fan of the Rockstar branding/marketing, however the Fox V4 is an awesome helmet.
It is last seasons model, but I haven't found anywhere else as cheap as this.
I haven't called the store to check stock, but it appears they have availability in each of the sizes.
Please don't buy helmet online without trying on. Typically you'd need to try 10-20 helmets to find 1-3 that actually fits and convenient.