4 point Seat Belt set up?

[Teeter79Z]

Hi there,
I am looking into seat belt options for my Z. I am considering going with a 4 point set up.

My question is about the upper mounting of the belts. Does anyone know if there is a mounting bar that would mount to mounting points where the original upper rachets mechanisms went?

I like the idea of having the 4 point uppers mounted in a high enough position to still be able to use the rear seats.

Thanks for your input!