Number Plate Beanie?

I need a nice warm beanie for camping. I don't want a sports team beanie, I'd like something train related. White Pass has a couple, but they're a bit boring (although a nice price at under $10). I was thinking that instead of team logo, how about a number plate? I photoshopped a White Pass beanie with a number plate from one of their hats (attached picture). Does anyone make something like this? If not, I suppose an industrious person could get on it and even put the railroad name on the side as well. That would like great, wouldn't it? Do you think it would sell, or am I just dreaming? If I'm just dreaming, does anyone know of a number plate patch I could buy to sew on a plain beanie?

Thanks.
Mark Fuller