When replacement headliner cards were available they were a direct replacement with no additional gluing necessary. So those pieces, if glued, were part of the original assembly. Did you have to remove any screws securing them to the roof supports?
Well the original design held up for over 30 years. The only thing that failed was the foam dissolved. If it were me, I would try cleaning off all the old glue on the card and the fabric and reattach it with contact cement. The right foam would hold up well into the next 20 years.No screws. The bar is press fit to a lip behind the sunroof panel. It holds the card tight to that area. Not a great design considering the wind turbulence from the sunroof. I could probably fit it after word but it would depend on the fabric that is used. I know to steer clear of thick foam backed fabric. I may just go with the marine-type vinyl with no foam.