Hi, I've just released a moderately priced set of 3D printable 28mm sci-fi cars that are designed to be used as scatter terrain for Superhero, near future and Sci-Fi wargames.
They're available on DriveThruRPG for a modest price:
https://www.drivethrurpg.com/browse/pub/13766/Tabletop-Terrain
I also have a 3D printable Garbage Truck which would fit right onto a Superhero table. My local gaming club uses them for the Batman Miniatures Game.