Arrgg...
I found a site that had 9" x 10" (I think) sheets of perforated metal, with round holes, square ones, and even hex patterning... and then I ~stupidly dinna mark the damned thing...
All I can remember is I was looking at various RC items - Losi Trail Trekker, the Tamiya semis, trailers, High-Lift's & crawlers, and somehow came across this site and there were the sheets, all in a row.
I've tried looking at my IE history, no joy. I did find an eBay seller for auto-grilles, and they are decent if ya want big pieces (6" x36") but I can't seem to find this site again.
Just Found It!
http://www.TheToyz.com and use the Quick Search box on the right side, plug in " Window or Grille Netting " and you'll get the options.
Sadly, I was mistaken on the size... 4" square pieces... but mebbe he'll sell bigger chunks?
WhiteWolf