G-Force has an outlet store online, don't remember the url, but google it, it'll pop up.
They sell discontinued and minor blemish helmets for cheap.
I tried on some helmets at a local motorcycle shop, then ordered the size that fit best.
If you're buying a SA helment though, I would try to buy locally.
Parking Lot Hero
2008 WRX daily driver
2003 ZX3 23D Autox Car 42 FSP
"Hella Functional - Raced, Not Hard Parked"