You don't say if you're comfortable with altering any custom skin yourself, or what you're really looking for: a full design, work done by someone else; or a basic design with the appropriate use of the CPanel tags that you can then customise to your heart's content.
It all depends on what you're looking for.
If you're just looking for a basic skin with the appropriate use of the CPanel tags, and you can customise it yourself, you can find a nice simple design with a goodly deal of CPanel functionality for as low as USD$50. If you're looking for the full design...that's a different story. You'll need not only a good designer, but someone who's familiar with CPanel tags. I don't know how much that would be.