Sounds like your trying to find a shade tree mechanic. Good luck on that, I used to know someone in Dallas that worked on the high end vehicles, but he had to get out of the game when everything went to computers, not many people that had vehicles without computers went to other mechanics, they wanted to do it themselves. I would imagine that's the same for most brands of vehicles, your good shade tree mechanics don't want to invest for the diagnostic equipment needed to work on the computer controlled vehicles and there isn't enough income coming in from the people that have pre-computer vehicles.