Check out this link, maybe they can send you in the right direction for a good used container.
You mite even be able to find one from a cartage or local shipping company. I used to work in the shipping delivery business. Seems like every yard had empties just sitting wasting space. You mite have to do a little welding or sealing but could be worth it once you have everything in order for the city....
I have seen two or three cut up and re welded to make houses out of!
Cargo - Facilities - Talleyrand - The Jacksonville Port Authority (JAXPORT)