In SC you could probably make do with a modified migratory top. I used to make them out of scrap 3/4" plywood. Just cut to fit the outer dimensions of your hive body, paint it, then slap it on. If you want to get fancy, add a 1"x cleat on the top at each end, and if you want to get even fancier, add another set of cleats at an angle so they extend down in the front and back of the hive. That should last you a good long time- no need for inner covers either. This won't last as long as a metal covered top, but it is a lot cheaper and faster to make.