This shop is in Rolesville, NC near Raleigh. The web site is www.allamericansurplus.com. I haven't tried ordering anything on-line, but they carry a lot of new and used military and tactical gear. The guys in the shop were really friendly and started whipping out catalogs and offering to order what I was looking for and ship it to me when we couldn't find it right away. Their camo prices are awesome. Pants were only $14.99. I didn't specifically price shirts. I've only been there one time, but I'll definitely go back.
I found the store because my in-laws live near Raleigh.