NAPA has a decent paint department, you just have to find one that does paint as not all do. They have color chips that you can match, and they can do OEM color codes. The paint is relatively cheap, it's the hardener thats expensive. If you're just doing your grill, you can get a 1/4 quart for around $20-30, and that will be more than enough. The hardener is around twice the cost of the color.