So I have this to sort
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The inspection cover hiding the electric sunroof gubbins keeps falling off Mrs Headroom's Multivan, you can see why. Basically the super thin stiff foam layer has disintegrated over time so the cover can't grip. I'm looking for suggestions on the best fix please guys without renewing the headliner.

The inspection cover hiding the electric sunroof gubbins keeps falling off Mrs Headroom's Multivan, you can see why. Basically the super thin stiff foam layer has disintegrated over time so the cover can't grip. I'm looking for suggestions on the best fix please guys without renewing the headliner.