Hello - I am interested in the Vogue Solid Steel Supply Vent. The return hole in the wall is about 6.5" x 12" (again, approximate, the cut out in the gyp is a bit uneven), but I don't see a size in your lineup. Would the 5" x 12" work? Also, is the surface treatment welcoming to paint? I would like to paint it. Finally, how does it attach to the wall, the current vent cover I have has 2 holes for screws. Thank you!