I found a cheap white clock at WalMart, taped off the dial cover, scuffed it up a little with scotchbrite, and painted it orange to match the Harley graphics I painted on the garage wall. Looks pretty cool, and cost a total of about twelve bucks. I have an HD bar-and-shield decal to put on the face. But I just haven't pulled it apart to attach the decal yet.
You could do the same in Ford blue, with a Ford decal, or something similar with Chevy, Dodge, Glock (Ha! A Glock Clock!), John Deere, Snap-On, etc.