You can get the materials to make the frame at lowes or home depot. Unfortunately I don't think that you can get the clear screen material at anywhere other than brs.
The mesh I have is clear 1/4" (fire fish here too, that's why I got the screens). If it doesn't work out with Ray, I can stuff it in a flat rate box and ship it.
I might have some extra from when I built mine. Used the BRS clear 1/4 mesh and then a window screen kit from Lowes. Also sprayed in black so it matches my tank trim. Let me look around and see if I can find the leftovers.