Sorry to hear your vinyl headliner was entirely removed. It works well, has zippers to access all deck gear, and was a handsome solution that stood up well over time.
The raw overhead was cushioned by stick-on foam, for sound and a little insulation. The vinyl is stapled to stringers where possible, and the staples hidden by cosmetic battens. Where such battens didn't work, they reversed the vinyl over the stitches. The vinyl is stretchy, so when done right it forms a smooth overhead, despite gravity.
However, I think some of the overhead was done before interior finishing. The overhead grab rails were added later, as were the rods to the chainplates in the difficult areas under the deck. I don't see how those installation subtleties can be duplicated on a finished boat.
To replace entire headliner appears to be a daunting job. Sewing machine skills required. Difficult patterning. Location and installation of the many very long zippers. Challenge of estimating stretch factors. Two-person installation with precision stapling in very awkward spaces.
I would start by inviting an upholsterer to view a similar Ericson, to see how the factory did it. Then give an estimate for your boat. The materials are not expensive, it's all skill and experience.
If it were me, I'd probably with come up with my own scheme--some vinyl, where it's easy. Other places, something else.
We have good blogs on interior ceiling carpentry, using wood and other materials, mostly for boats in the pre-vinyl era
Here're some headliner details
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