I have a HUGE piece of netting that I stitched together years ago - it's been used over the stern of a sailboat and to cover a mini-van. With the addition of some loops it could be hung and several kids could fit underneath.
I also have 10 - 20 yards of wally-ripstop.
What I don't have is time. I'd be happy to ship the fabric to anyone who can volunteer to make the hammocks. PM me at sandykayak at yahoo dot com
It would be great if someone at the receiving end could build hammock stands. Perhaps someone from HF could send instructions and pictures. Hopefully, they can find the wood...or even PVC pipes or metal pipes.