My 96 sport has a tow package on it. The previous owners apparently tried to tow a massive heavy load with a lot of tongue weight and somewhat flattened the rear springs. I'd like the ability to tow a decent load, but I don't want to add a leaf if not necessary (I like my kidneys where they are).

Has anyone found and installed an air bag or air shock system? How do you like it? Names and numbers...?