All,
I went crazy for over two weeks trying to find speaker grill cloth and speaker fabric. Nobody had it, except a few places that wanted to sell me a huge roll. Then it hit me! Plain old fabric! I ran to my local fabric & craft store and amazingly, they had 58 zillion types of fabric. Different colors, thicknesses, patterns, you name it. I bought 2 yards of black fabric that was pretty thick (you could make a pair of pants out of it,) for a total cost of $5.98. I stapled the fabric on and it looked awesome. I stapled it on so tight that you can't even tell it's fabric, unless you look closely. Done and done!