Here's a paper model of a chemical container train car I've used as a prop in my Savage Cyberworld -campaign. Print it on two A4/Letter sheets, on cardstock, 120g paper or something else strudier than standard paper. I haven't added instructions as the model is quite simple, and I didn't see it necessary to add the parts that attach train cars to each other (whatever they are called in English), model worked quite well without them.
Here's a small free papercraft download for you - something little that's easy to put together and can enliven your modern, cyberpunk, scifi or other roleplaying or miniature games. Hospital beds, curtains and small bedside -desks. These pieces were used in my Savage Cyberpunk game.
Anyone can get a great miniature collections very cheaply, thanks to collectible miniatures vith very rare miniatures and stores selling singles. For as low as $25, you can get a basic set of 50 miniatures that has a lot of those extras your player characters are going to meet a lot, plus a lot of different characters for pc's or villains. I've chosen to use Troll & Toad as I've made a lot of purchases with them I'm happy with, and they have a great collection (including Mage Knight) and good photos of everything.
For some time, I've been looking at Future Armada's Invictus with a curious eye, but I haven't had actual need for it. A few days ago I run a session of Babylon 5 and went to check what DriveThruRpg has to offer. I had been looking at High Space's Euphoria as I was planning to use it's setting Lantern as a base for the game.