sorry to hear. i have a gopro mounted in my car not for road rage, but idiot bicycle ridors that dont obey traffic sign or ride single file in areas that are specified. someday they will hit my car and try to blame me. well, i have footage.
you can also get dash cams too. i recommend you get one especially if your ride is a hobby car. even if there are no events to report, you have cool footage of your car.