Are there places you can order custom teapots similar to the way you can order custom t-shirts?

I have a design I want to use and I know nobody sells it. If you don’t know of a place that does this is there an ceramicist (yes I just made that word up) that would be willing to do such work? Are there plain teapots I can buy that I could paint on top of?

Also, do you have a design you would love to see made? Do you think someone could start a teapot business similar to http://threadless.com/