Check out Pet Screen. It has somewhat larger holes than regular aluminum screen, and the stuff is a vinyl coated string I think. You would have to keep your light up off of it. Or, there is shade cloth.. same thing with it, though. Otherwise, you will have to order something. I have a cage made out of fish pond mesh that is 1/8"... it is black plastic, and it works really well. I did have to change out the top because the plastic warped quite a bit over several months. I don't believe you could get it to work in an aluminum frame, though.
And, if you find that screen that cages.net uses, you win! Lots of us have looked for it over the past year or two. Cages.net has it specially made for them.
Heika