That RJ wheel guy tried to sell me some of those because all his better looking wheels where 5 lug and I have 4. He said his where made in house. I'm glad I passed that offer up....
Does Ichiba make adapters? I know a ton of guys using their spacers with no problems. If they do make them, I would go with those. Not some no-name company. Check out H&R too, I know they make spacers, not sure about adapters.