Yep, same stuff you use on windows so long as it's not metal or cheap plastic. Thicker polyethylene, PVC, and fiberglass screen will work fine. The crays are seeking the simple sugars excreted by bacteria breaking down organic matter. You can offer them other items to draw their attention away from the filters. A tied bundle of barley straw will attract them like kids to a candy store. They'll harvest the same sugars as they get from the filters as the straw is broken down by bacteria. Just tie the bundles with synthetic line since natural materials will also break down and the crays will eat the tie and loosen the bundle. Coconut shells, hair and all, will do the same thing. Just make sure there's no coconut meat left in the shell. The meat will overtax your system.
You can keep the sand. Just add some aragonite sand to it or replace a couple of cups worth if you don't want to thicken the substrate bed.
The book's cover pic is a dominant male between 2 and 3 years old. They'll live up to 5 years under optimum conditions. Expect your crays (males) to reach just over a foot long and up to 1.1 pounds in weight on average.