Both Shootrite and Thunder Ranch offer revolver specific courses. I have attended the Shootrite course and loved it. It was my first formal handgun training and it turned out to be the best money I have ever spent on a shooting course. Tiger McKee is a great teacher and endorsed by Clint Smith.
http://www.shootrite.org/courses/Handgun/Handgun.html
http://www.thunderranchinc.com/courses.html
Hope these help.