So here's some bits I've printed off the net and use. The pringles-can storage tank and cargo container are by
tommygun (lots of wargame scenics there!), while the oatmeal-can apartments and the paper towel core office building are printed from textures I found on
http://www.cgtextures.com and then just glued onto the containers.
The storage tank has a top designed for it, but I bought a set of resin parts from armorcast.com that includes an insustrial base, two vertical pipe runs, and a machinery topper for a pringles can. I just needed the textures to make the sides look right. So, the pringles can is not a finished work yet.
The buildings were done up to help in forced-perspective shots with skyline.