I just got finished swapping the headliner from a 91 OCC to 91 RMW because it's in slightly better condition and I'll be completely dismantling the OCC.....
In the process of this, I used spray contact cement to glue new fabric onto the front section......
Rather than do re-inforcement along the sides of the roof window, I split the front section from the back right across the center of the backseat courtesy lights, pulled fabric over the cut ends and glued. The front and rear sections are now installed seperately and the courtesy lights frame and hold the cut ends.....It could easily be mistaken for factory original!