If there was enough demand for it, there would be one.
you have much to learn about insurance underwriting. That isnt how it works.
so what happens if car A crosses the median and hits car B. Car B driver is not wearing seatbelt. You are saying that Insurance company A would not cover the damages caused to the driver. But they have to, because their insured was negligent in operating his vehicle and caused damage to driver B. They are liable as a matter of common law. Insurance company A and Driver B have no contract so they cannot enforce this on them.
See doesnt work, insurance is to cover your negligence and cannot enfore clauses upon a third party.