Headliner replacement options?
If the stringers are in place and sound why not use wood batten strips fitted perpendicular to the stringers. These are available in teak, mahogany and probably some light colored wood like birch or ash if you want a lighter color. If you install the strips with screws you would be able to get them off as needed. If you fit the edges close and varnish it should look just fine. The strips are about 1 1/2" wide and easy to work.
I have a similar treatment on a 1985, First 345 and it looks really good and almost zero maintenance except for a little Pledge.