I wonder if this could be 3d printed…
Have you seen this?
https://www.etsy.com/uk/listing/857576735/london-uk-3d-city-map-3d-buildings-and
Yeah It was one of those that got me googling.
My friend Dave mapped oldham years ago and 3d printed it, back when it was proper hard work… Wonder if he has any pictures.
Oh found this one too Tactile Maps Easily | Touch Mapper