Found it is a dusty corner of my garrage. Excuse the dust.
It was made for 54 mm inquisitor stye games so it is big but it would be easy enough to build a 28 mm version.


The frame was just glued together old bits of spru.
A cover was made by gluing on kitchen roll and then painting it is a solution of PVA and water. While it was drying I shaped some of the folds to get the shape I wanted. Would be easy enough to make the roof seperate to allow for access to the inside.