Looking to buy 3 lap belts for the back of my 68' dart

I own a 68' dart with black interior and after removing the rear bench seat I discovered there were no seat belts in the back. I would like to install 3 black lap belts in the back so if anyone has any they are willing to sell please let me know. The buckles are black wrinkle in the front and I would like to match them. Please PM me. Thank you.