I read a 7 page article on how hard it is to register one. But they do say you can hire an agent to find the car, bring it over to the states, and do all the paper work, dmv, dot stuff. It's a no hassle solution, but it costs about 10k$ for the agents work + the cars price, DOT changes, paperwork, registration, emissions, etc.
GOD! I want a RHD so bad.