I didn't see a lot of options for grilles that didn't look like a cheap hubcap from J.C. Whitney catalog and not much in the DIY realm.
In the mean time, if any of you folks ever need some small parts welded for your DIY/hobby stuff, ship it here and I'll hook you up free of charge if it isn't too involved. Especially decorative aluminum welds. I have a pro welding op set up here at home. I can also weld anodized parts. So any piece of custom hardware, say to mount a tweeter on the outside of a cabinet or something or even speaker stands that you just can't buy anywhere.