You won't beat Berg Military Tires in Fayetteville if buying from a business. And you can find them even cheaper on Craigslist. Sometimes. With most of the owners in Fayetteville. There's like 6 or 7 total Military Supply businesses in Fayetteville. I bought some straps down there once that a dude simply "forgot to take them out of his trunk as he left the barracks". There's so much comes out of that place it's scary... And a lot ends out on Fayetteville CL. A simple search under "general" on the F-CL brought up 5 pages worth.
I stopped at Delk's on my way through and inquired on some canvas tarpaulins once when I was doing soft tops. I can't remember the price but I do remember I was so shocked I couldn't even shut my mouth to pronounce "Thanks anyways". And they had huge boxes of it, like a lifetime supply. I bought all of it that Bob's Army Surplus had in Raleigh for a high price that was reasonable compared to Delk's.