Who sells the three point belts for a 68 B body?

I know Mopar Action did an article on this years ago. Maybe it's still in their tech archives somewhere.

XV used to, but I think they gone...

Try seatbeltsolutions.com or wesco performance.

Corbeau sells universal ones as well as a couple other companies.

I used Wesco Performance 3 point seat belts front and rear in my '69 Super Bee.

For the front belts, I used Part# WELR-L This mounts to the factory shoulder belt bolt location near the roof, but also drops the belt location to a more comfortable position to go over your shoulder.

For the rear (I just did this a few days ago) I used part# welr, and I mounted the seat belts to the factory bolt locations, passed the strap through the factory rear shoulder belt openings in the rear deck(who knew they were a factory option?). I had planned to mount the retractor using the factory seat belt bolt locations also, but there wasn't quite enough room. A person could probably easily make some room with a few seat mods, but I chose to drill a hole and install the mounting plates about 5" above the factory bolt location. Looks and performs like a factory install.

http://wescoperformance.stores.yahoo.net/resebe.html

It just occurred to me that since your car is a '68 it might not have the shoulder belt mounting point at the roof... I believe that the belts themselves became mandatory in January 68, but I'm not sure if the mounting point was there (and not used) prior to that.

Sorry for any confusion if you don't have them!

I used seatbeltplanet.com I have a 70 GTX so I don't know about your shoulder mount point but mine went right in the mount holes that were stock. One thing to consider is the retractor. In my case I used different seats (corbeau) and the handle on the seat to lean it forward/aft was right at the same place as the retractor reel housing. For now, I had to swap the driver side with the passenger side (the seats) so the recline lever is on the console side. I don't like that set up but for now it will do until I get motivated to move the reel mount point back.....if I even can now without MAJOR issues.
This never even crossed my mind while I had the car down to replacing metal.

How did you mount the retractor and outer anchor? Both on the factory outer lap belt bolt? 2nd hole? Please post a pic or 2 of your install. Thanks, PJ