There's a few in N-scale. Just print them out on heavy cardstock, cut them out, and glue! http://www.igshansa.de/igsdownload.html Good for populating scenary w/o going broke.
Theorertically, you could mass-produce all kinds of things on a color printer, like box cars (less trucks and couplers, of course), row houses, billboards, semi-trailers, you-name-it... I remember reading somewhere about somebody who photographed actual prototype cars and reduced them down to HO scale, complete with authentic weathering and grafitti...
These containers were meant more for scenary where you can print out hundreds and stack them up somewhere in a yard. I doubt you can use them on a double stack though I haven't had a chance to try a few.
Here's a link to alot of interesting and useful things for both HO and N scale. http://home.wanadoo.nl/schatborn/ I know they have trailers and containers that can be printed out for that N scale container ship or intermodal yard.
