so i thought about tough, easily accessible, workable stuff. i am thinking a seat belt. i have a watch band made from it, wow! it is tough as nails. 50lb test, lighter and a THICK needle i already have.
I used to test my field gear designs, stitching, etc. with seat belt straps. Here's a good tip for you. Go to a auto junkyard and ask the attendant if you can cut off some seat belt strapping from his junk cars. I have never had a problem getting that stuff for free.