couldn't you just make something like that?
just get some 1/8" tubing from lowes, and find someone with a conduit bender
Then you could space the bars the way you wanted, too, or make designs... like a heart or a butterfly.....
then you could just drill some 1/8" holes into the face of your box, say 1/2 as deep as your box is thick, and put 'em in...
or you could use thicker bars, that might look kinda sweet too.... or fab a cover out of diamondplate.
if you don't have or can't find a conduit bender, you could even make it out of aluminum, and then have it anodized....
it would look sexxxxxxy.