not possible is it? found a fantastic looking 89 convertible listed as a fixer upper, but it only has 70000 miles on it. assuming the fix isn't the gearbox, i'd love it except for the fact that it has no airbag. i'm sure many will say the 900 is safe as is, but this would be the first car i'd buy, and insurance and parents keep me from getting anything without the airbag. heard retrofit wasn't possible. how so?