design clip art / illustrations for health website

We need someone to design approximately 15 - 20 images / clip art for an online mental health website. The images will help explain the services (such as different types of providers like psychiatrists, paediatricians and therapists) and the consultation process (such as refer, book an appointment, consultation). The images need to be simple, friendly and eye-catching, fitting in with our colour scheme, and fit to the areas specified by our web designer. Some experience in branding / web art would be useful.