Aftermarket shoulder belts for 68 barracuda convertible

There were teeth broken off in the steering wheel.
My mom pass out while driving her 65 mustang. She had started up from a stop light and the car went through the intersection and hit a parked car. The drivers side of the windshield was smashed outward right inline with the steering wheel. The injury to her head was to the back of her head, so she must have pivoted over the steering wheel and broken out the windshield with the back of her head. My guess is she was not wearing a seatbelt. she was 5 foot on a good day. the car did not suffer too much damage. The right front fender, hood, grill, bumper etc were replaced. The core support was straightened. I don't know about the inner fender / frame rail, it might have been replaced?

I assume the hit was in the 15 mph range, but that is just speculation on my part due to the relatively small level of damage to the car and the report that she had started up from a stop at the intersection.

She has little to no memory of the crash.