I think the board is good. I'll check FB, too - thanks for the tip! Do you just scrape the old foam headliner from the board?Do you need the headliner or just the backer board and you will recover it yourself?
I saw one listed on facebook in one of the bronco pages.
If your backer board is good, some spray adhesive and a local hobby lobby or joann fabrics and easy fix.
It's attached to the roof so no cardboard. Just old, yellow fiberglass insulation with a thin layer of colored foam glued to it on the interior side. I'm thinking of just pulling it all down and starting from scratch.I suppose it is possible, I just remember seeing a guy on facebook selling the cardboard backer for the B2 headliner. Maybe different year?
But yeah that yellow stuff you are seeing, what is it attached to?