$100.50 for the set
http://www.thepartsbin.com/guides/bmw/3.0cs/seat_belt.html.
i bought a set like this, although not this exact one, and it works great - i did have to modify the mechanism, as was meant to be mounted vertically, but this just involved removing a ball-bearing that dropped into a lock/slot when not vertical.
my car is a 74 so the mounting hole was there, but if not, would be easy to weld in a nut.
http://www.thepartsbin.com/guides/bmw/3.0cs/seat_belt.html.
i bought a set like this, although not this exact one, and it works great - i did have to modify the mechanism, as was meant to be mounted vertically, but this just involved removing a ball-bearing that dropped into a lock/slot when not vertical.
my car is a 74 so the mounting hole was there, but if not, would be easy to weld in a nut.