I repaired the sagging headliner on my '93 targa top and made a video about it. I was able to use the original fabric, though there are oem style replacement fabrics available for around $40 if your headliner fabric is damaged. I used velcro to attach the pad in place for easy removal/repair in the future. Spray Headliner adhesive cost around $12, velcro around $7. Total cost under $20. It looks and works fantastic and much less expensive than paying $150 for an aftermarket headliner replacement.
Let me know what you guys think. Take it easy - Ozz
The youtube video link: