We ordered ours from domed numbers (link above from Todd). I ordered them online, and when they came, they weren't exactly what I thought they would be. I called the company, they had me take a picture of the boat, then matched the font and color EXACTLY to the "Centurion" on the boat.
No charge for re-doing them...needless to say, we are very happy customers!
If I wasn't at work, I would post a picture...maybe later this evening.