If that's the only problem, then that would be fixed simply by taking "computers required to interface with the car's computers" i.e. a <$200 OBD-II device with you in the car, not choosing a car with 20+ years of wear and tear.
Also, since many of these places have a lot of used cars that once were in the EU or other places with legally required computers, this is changing as now most of the mechanics even in relatively poor remote places have to have these devices as now many of their local customers don't have "computerless" cars any more, and the existing pre-2003 cars won't last forever even there.
