I'm by no means an expert, but I really don't think it would take much. Cloning is being used in polo[1], which suggests that it isn't terribly difficult. Once you have the egg cell you just use in vitro fertilization, which has been possible for decades.
It's also worth noting that in the U.S. neither therapeutic nor reproductive cloning are banned at the Federal level, although reproductive cloning is banned in ~15 states. So any scientist participating would not be breaking any laws.
Frankly it wouldn't surprise me if some wealthy people have cloned themselves in secret. I imagine that there are a decent number of scientists who wouldn't find it unethical.
I am still curious whether some rogue scientist has tried to clone humans.