You can always try the tech operation in St. Croix (can't recall the name) that sponsored and aggressively promoted the man they called "Doctor Deep" on his fatal attempt to set a world depth record. They guy went from new OW diver to new tech diver to attempting world record in a couple of years. The shop said he was a quick learner, having quickly surpassed his trimix instructor's personal deepest dive of 215 feet. Under their tutelage, they said he had learned more about technical diving in that year or two than any other diver on Earth. Wth a track record like that, they have to be good.