black sleeves for rear seatbelts on either side of rear bench

This is for a 1970 Dart and I think they are the same for 1968-71 Darts. I'm changing interior colors and bought new seat belts, but the rear lap belts didn't come with the sleeves that hold the belt up on the outsides of the back bench seat where they snake up between the back bench bottom and the side panels. Anybody got a pair???