Seriously, check Amazon. You can get all sorts of nylon 'parachute' hammocks online, like this one. It's $17, while a comparable ENO hammock starts between $50 and $80, and hammock straps are the same way.

Don't leave your hammock straps out, either; the weather will also destroy them over time. If you want a more permanent solution, get some sturdy boat mooring rings or some big eye bolts and mount them securely into a tree or something.

Generally speaking, if you don't want your stuff to get destroyed, don't leave it outside.