Thanks for the ideas! I exhausted all the window/hardware stores in the area, and Craigslist has had nothing for weeks. Eh, maybe I'll just do the welded wire thing. This is getting too frustrating.
Those of you who have converted a shed to a coop, where did you get your windows? I'd rather have the shed-type windows instead of just cutting a square out and covering with welded wire. I'd rather be able to close them and open them, and have it look nice. I'm specifically looking for windows...