Alpkit rig 7 tarp is the cheapest sil-nylon tarp I could find when I looked, and it's very high quality, perfect for hammock camping etc. I love mine. Fantastic shit for the price.
Hammock-wise... I use a cheapo hammock my sister brought me when she was in Laos. Does the job well, and is light enough. I've tried a couple lightweight ones (one net one, one cammo material with lots of strings at either end) from soldier of fortune but they both are uncomfortable as fuck.
I've been recommended
http://www.ukhammocks.co.uk by a couple people. Prices are good and they look very high quality. Apparently the dude is happy to mod them for you a bit too.
That's where I'd be going if I was looking for a new hammock.
