Wheel well liners

I'm having trouble finding wheel well liners for my truck. I'm looking to sort of clean up the look behind the rear wheels. I've been able to find them for Dodges, which makes sence as they are mostly empty space anyways. "2005 Silverado 1500HD"

I'm not sure what a wheel well liner is, but I assume you are trying to cover the gap between the frame rail and the body................
 
 http://www.liftlips.com/