Website Prototype/Mockups

We are looking to build a website to do some data entry for a physician clinic. We have created a few low fidelity Balsamiq mockups. We will want this to be converted into high fidelity mockups and full click through. We are looking to get CSS and all art work. The whole project will be about 15 web pages, plus or minus 2. We will need a quick turnaround. We will ask you to design one page and submit for review before approving the full project.