You're looking for an aluminum or steel carport. A little Google says Superior Awning in Yuma can supply them: https://plus.google.com/106205160716...ut?gl=us&hl=en
Also consider some baffling inside the container that directs the cold air from the conditioning unit into intake of the UPS units. This will localize the cooling. It there's other electronics you need to cool using plastic curtains to create a cold side and a warm side within the equipment racking will help.