There is an intermediate Orton-Gillingham program. There are fewer tutors for this program, but you can locate a certified tutor through the International Dyslexia Association at www.interdys.org. Search for your local branch. Give them a call, and they can put you in touch with a certified tutor.
You can also locate tutors through Masonic Learning Centers in your area.
Dyslexia is life-long, but with proper tutoring and accommodations, children can be very successful!