Hi, I'm sure there must be several in SW Florida. I believe that Florida has the highest ratio of licensed colon hydrotherapists per capita of any other state, and that large number encourages competition and helps keep costs reasonable.
Are you near Naples? Have you tried your telephone book's Yellow Pages? Also, call massage therapists nearby and ask if they can refer you. In Florida, in order to practice colon hydrotherapy, you must first be a state licensed massage therapist (LMT).
You can also call the Florida School of Natural Health in Gainsville and ask if any of their graduates practice in your area.