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
"There's a sucker born every minute" P.T. Barnum, on why he always had customers to see the sideshow features.