Check out Restaurant supply distributors. They frequently have stuff available. I's go the free fridge route and mod the door with acrylic if you need a see through front. I just placed temp probes in the tubs on each shelf and have no need to open mine with the displays on the outside.
http://i254.photobucket.com/albums/h...psea370fcd.jpg
Easy build...
http://cdconstrictors.com/?page_id=116