Bravo

I have been searching and asking for some time about installing retractable seat belts in my early 911. There is no pre-drilled nut in the door post for the shoulder strap and no visible mounting location for the retract as some people have suggested there is. I am not opposed to fabrication. Any insight into this like what to do or where to buy a kit would be appreciated. Additionally I have updated to 86 seats.

Dean
1966 911