US military Shelby Daytona apparition?

Picture here is just eye candy, but I swear I saw a killer looking Shelby Daytona last week while driving through the Midwest US. It was a two-tone grey and the most bad-ass looking Shelby mod I had ever seen. It was on a flatbed being pulled by a nice looking pickup. Can't trust my memory on the wording but thought it said US military over the window or perhaps US Navy or airforce? Thought it would be a cinch to find more about it online, but I'm striking out. This description ring a bell for anyone?