this place sells black mesh kits on ebay, they arent metal like the stuff at home depot though, they are plastic but i think thats better since it wont rust or corrode or anything like that. i got one and they look pretty good IMO.
If you get the creamic metal sheet under lay at Home Depot that doesn't rust. I got a sheet of that for free from home depot because it was damaged in one corner. Good stuff i used on my body kit for my accord back in the day