Suggest you go to the Engineers and Technicians forum and ask there.
You can simply go to college (again) and learn to be an Aircraft Engineer.
City of Bristol College - Course Finder My brother studied there and never looked back. Now he has more money than God but then that's probably because he doesn't spend it.
Don't just look at big maintenance companies. You should go to all the local airfields that have small maintenance facilities and ask if they need an apprentice.