Dunno how much "a lot of it" is but Tractor Supply has a some pre packaged stuff in 3-4 different styles. Haven't seen any bulk rolls anywhere, but then I'm not looking for it either.
Like Sapper said an Army Surplus store or find an Attwoods ( a chain store like TS is out of Oklahoma) who should have something like that. I'll be in Jacksonville in a couple days and had planned to take a look there for myself.
"These are the times that try men's soul's"...Thomas Paine
"Those who fail to learn from History are doomed to repeat it" ....Santayana
"You ARE entitled to your own opinions...you are NOT entitled to your own Facts" ...Daniel Patrick Moynihan