Thank you for the ideas and pics. I went back to the bedliner pile and here is what I came up with for sideskirts. As you can see, I flipped over the top side part of the bedliner and turned the lip facing the underside of the truck. The old rear corner of the liner is the start of a flare for the rear wheel opening. I'll make a piece to enlarge it. The skirt is at the same level as the belly pan so it will be easy to fill the gap. My son said it looks like a cheesy body kit. I suppose compared to the skirts on his Eagle Talon with a CD of .27.