Hello,
Lets try this again without losing a fully typed up response to a bad click on the browser......
I haven't found much that would help you here. Star wars has several bases and cities that may fit but with the wrong flavor (Bespin may be close). Stargate Atlantis maps may be a decent option, and I've seen a few on the web. Starfleet spacestations are actually pretty good matches
https://www.google.com/imgres?imgurl=https%3A%2F%2Frpgcharacters.files.wordpress.com%2F2014%2F02%2Fspire_prodigus.png&imgrefurl=https%3A%2F%2Frpgcharacters.wordpress.com%2F2014%2F02%2F03%2Fepic-space-station-maps%2F&docid=L8FMBPsLfznm9M&tbnid=RPfMU25Vd6qQWM%3A&vet=1&w=2480&h=3508&bih=613&biw=1333&q=space%20station%20map&ved=0ahUKEwif2bWW_svRAhXs24MKHf_LB4gQMwhIKAIwAg&iact=mrc&uact=8#h=3508&imgdii=RPfMU25Vd6qQWM%3A%3BRPfMU25Vd6qQWM%3A%3B_Hn9yzpXsPOKFM%3A&vet=1&w=2480
Cylindrical and ring style space city maps exist but those don't match to what I think of as a "bubble world/city". With a bubble city I think of a more planar disk design with gravity all pointing one or maybe two directions.
For your ship/dungeon design Space Hulk may be a good option - but it has been years since I've picked up a Games Workshop product.
All I can say is good luck and let us know if you find something. I know I would file it away until I needed something sometime.