Check out these places for BDU's and gear.
http://bdu.com/
http://www.cpgear.com/homepage
A lot of people wear paintball goggles for their full face protection. I would recommend the JT spectra flex 8 goggles with a thermal (double) lens. They won't fog up on you and the flexible face mask will allow you an unobstructed cheek weld on your rifle.