If you do a search for George Michael salons, you will will get some hits. But here is a list below of the one's on the U.S. that I know about. Only some have URL's. The first salon listed will give you a lot of info.
Some are entire GM salons dedicated to long hair. Others list a salon where stylist is GM trained. The one I go to is totally dedicated to long hair. You would love it!
1)George Michaels of Beverly Hills, Beverly HIlls Ca. 310/282-0957. Jessie Martinez
http://www.georgemichael-longhair.com/
2)Studio 839, Encinitas, CA. 619-438-9839. Maryanne Hanwkins or Denise Zummo
3)Tammera's for Long Hair, Ormand Beach, FL 904/677-1064.
4)Ginisa Beauty Salon, Narranga, FL. 305/247-4804. Isabel Molina
5)Scissors Wizards, Linwood, NJ. 609/653-4247. Susan Tichinelly
6)Rapunzel's Salon, Columbus, OH 614/445-7650. Dave and Darlene Barrett
7)The Class Act, Chillicothe, OH 614/773-2611. Dave and Darlene Barrett again
8)Jan Michaels, St Thomas, Virgin Islands 809/776-1151. Michael Cabucangan
9)Farlows Salon, Atlanta, GA 404/256-3255. Charles Farlow or Brent Jones
http://www.fabuloushair.net/
10)Upstage Hairdesigners, Richmond, VA 804/358-1916. Gladys Chippenden
11)George Michael of Madison Avenue, New York, NY 212/752-1177. Maria Matarrazzo
http://madoralonghairheaven.com/
12)Bill Mahavier, Frisco, TX 469/233-3504. Bill Mahavie
http://www.lovelonghair.com/products.htm
13)Long hair studio, Plano, TX 214/668-6122. Jim Butchee
14)Catherine's Salon, Woodbridge, VA 703/494-5445
http://www.catherinessalon.com/
15)Enchantress Salon, Olmsted Falls, Ohio (440) 235-8550
http://www.enchantress.com
16) http://www.downyourback.com/