Please suggest some talented designers who can beautify a web app

Im finished my web app. Its has a very simple design. Its a list of links (think hacker-news/reddit). Now Im looking for a high end developer who can help me bring the look and feel of the site up a few notches (by producing a couple of mockups). The reason I need a high end developer is because the site design is very constrained since its just a list of links. The only other major element of the site is the header.

Where can I find high end designers who are willing to work on such a job? Please suggest any designers that you know are quality and are available.