I also wouldn't bother to screen it but if you really want to and that's all the screening you intend to do, I'd pick up some window screen at the local hardware store. You might have to replace it a few times because they will tend to goo it up, but it'll be a whole lot cheaper then $20. But if you're going to make screened bottom boards or something elso too, then invest in the #8 cloth. I use window screening over the top of my top feeder when I move nucs into ten frame equipment. I can refill the feeder without having to worry about putting on gear.