This is a low poly 3D model of the station depicted in a painting on Picard's quarters in TNG, painted by Rick Sternbach. https://www.ex-astris-scientia.org/schematics/station-picard-painting.jpg
I developed this design into Fontana Station as an homage to the late Dorothy Fontana, and created this 3D model to use it as a little hologram on the station's command center, which you can see here: https://tadeodoria.com/projects/YaWo0b?album_id=68213
I won't be developing this exterior model further, but I have read some interest in it, so I'm making it available for download. I hope it inspires someone to create a proper exterior model. :)