a friend of mine has a new temperature controlled Emerson outdoor enclosure that is setup for UPS. Outside dimensions are 32"wide 33" deep, 53" high. It has doors on front and back. All the shelves are bolted in place so it would be easy to remove them and reconfigure to your needs. The unit is telecomm/utility company grade--the good stuff! He is looking to get $900 plus shipping out of California.
PM for more details.