I have seen a lot of these posts but they are all pretty old and a lot of the links don't work. I'm looking for a place to buy a piece of Tyvek to fit my new Copper Spur 3. Anyone have any suggestions where I can buy a pre-cut sheet?

Also, I've been off the forum for a while, is there another lightweight and extremely puncture resistant material out there that people are now using? I used to build houses and trust that tyvek is very puncture resistant; often it was hard to get my utility knife into it to start a cut.

Anyway, thanks.