Cody,
I finally found the prices from 2 years ago, so you would have to assume higher. For a run of 24 pieces of one kind, with the engineering fee it worked out to about $70 per panel. The price for the bottoms was just a little higher than the backs.
Obviously, the bottoms are what is usually the worst, but the 1-2 combination of both being replaced by stainless is a strong marketing edge from my experience. Also, you have to think about the labor time to grind and sand plus the cost of spray paint and rust inhibitors. With new panels that require no painting, you just remove and replace!