LF: Black Plastic light diffuser ( egg crate ) GVRD
 

See a fellow reefer selling some in Calgary, any available here in GVRD? Only looking for one sheet 4'x2"

Mikepclo has some black egg crate available, try sending him a PM

If you don't get any there, I bought some at Rona Richmond a few yrs back

Rona only carries white now, thanks Tn23 please let me know

Even in Richmond? Rona never carried black in Surrey either. Thats why I had to go to Richmond.

Try Lowes.

black egg crate
 

try spray paint

It's not very convenient but last time I was in Lowe's in Seattle they had it.
If you ever head across the border it might be worth a stop.