Yeah, they don't have a solid equivalent, but they do have tri-phasic pills with a different hormone combination. TriNovum is the one I switched to when I moved over. I was originally on the generic version of regular Ortho-TriCyclen and didn't really notice too much of a difference for the first 8 months or so, though after about a year and a half I decided to go off of BC entirely because it made me really irritable.
Like Cali Girl said, they'll be able to go through what they do have and figure something out. My GP had a book that listed the various kinds and what hormones they were made of, and offered suggestions. They'll probably start you out on 3 months worth and you can see how you like it.