Check out University of Utah Intensive Stuttering Clinic. They aren't children in the program. This is what helped me since I didn't like speech therapy. https://health.utah.edu/communication-sciences-disorders/clinical/intensive-stuttering Dr. Blomgrem, has done an amazing job at research and teaching those that have a stutter. He also stutters as well and has had an amazing career. I went from not wanting to be part of society to overcoming fears of talking on the phone, asking for help from strangers, and being openly to strangers about my stutter.