The original fiber tack strip should be removed and the underlying surface cleaned. New tack strip can be cut from waterproof panel board and glued or riveted in place. I have found that just brushing Weldwood adhesive onto the metal and back edge of the headliner material works just fine. Im most cases, there is no need to replace the tack strip at all.

Check with Bob Drake for tack strip.They have about 7 different sizes. bobdrake.com