When I was in LA, I was fascinated by the Western Truck Exchange mudflaps seen rolling around Southern California. One time I saw the logo on a T-shirt in a Best Buy commercial, and figured that was both awesome and unauthorized. Well, I just found an article that confirms both for you:
What got me thinking about the Western Truck Exchange logo was a great one I saw today up here: Western Truck Fabrication. This Hayward company builds commercial truck bodies. And their logo was totally awesome too: WTF. Can I make a shirt of that and get away with it too?