Yes, I would concur - best to call the schools you are interested in once you come up with a list, and simply ask them. There are junior openings, but it seems the number varies by school depending on the given year and their particular situation. If you are in a rush and this is an option, an educational consultant could assist greatly in making suggestions and contacting the schools. She would then give you a list of schools which fit your criteria and have openings. That said, I understand placement in the junior year is more challenging just because there are fewer spots, and the junior year at a new school he would have to hit the ground running, as it is a key academic year for college. Good luck.