Looking for Cargo Webbing...

Some of the race car aftermarket manufacturers do scale window netting (which is actually webbing). The common 1/25 might be about the right size, but I don't know if they make sheets large enough for what you're looking to do. It may be an avenue to explore.

Like Hawkeye, I've generally made my own--though I use sports ankle-wrapping tape instead of Chartpak. It's got a nice textile texture and appearance (plus it's thin and nice and wide), and the low-tack adhesive is easy to work with.

Time to pick up some small brass rings and some Chart Pak drafting tape or slice some masking tape into appropriately sized strips and make your own.

Try searching for 1/35 Camouflage net on Ebay, just had a look and there is a fair bit there. Not sure you will find it in photoetch however. I dont think I've ever seen that to be honest as it wouldnt look right to me.

If anyone else on here has seen it sure they will reply

Phil