A number of online resources exist where you can find local eating disorder professionals, support groups, and residential treatment facilities. You can also call a local hospital or university and ask if they have an eating disorders program. Such a program will be able to give you referrals.
National Association of Anorexia Nervosa and Associated Disorders (ANAD): Listings include therapists, nutritionists, support groups (free), and treatment facilities.
International Association of Eating Disorder Professionals (IAEDP): Listings include therapists, nutritionists, and physicians.
National Eating Disorders Association: Listings include therapists, nutritionists, physicians, and free support groups.
Something Fishy: Listings include therapists, nutritionists, physicians, support groups, and treatment facilities.
Bulimia.com: Listings include individual and group therapists, and treatment facilities.