I made my own set. It's not hard work but it's kind of tedious since unlike the 8GA grill where it's a straight cut to the fins, the 8GB grill has horizontal fins that end at a weird angle. So it's best to cut as close to the edge as you can and then carefully sand out the rest of the leftover bump until it's flush with the border of the grill.
http://i334.photobucket.com/albums/m...ps88182eed.jpg
http://i334.photobucket.com/albums/m...1350658789.jpg
As you see on the sides I didn't do that but I got kind of lazy and it's difficult to cut the end of the fins because the fins are hollow and it will create notches into the border so I guess cut them out and fill it up with bondo.