What 3 point seatbelts would work in a 68 vw beetle?

Im restoring an old beetle and need to up the safetyWhat 3 point seatbelts would work in a 68 vw beetle?Same ones used in later years.You will need to weld the threaded mounting points in place.This should not be too hard it has been done many times.You will want to get seats with headrests to avoid whiplash.What 3 point seatbelts would work in a 68 vw beetle?if you need some let me know i have a set.