I have to have this ready by tomorrow so I really hope someone can help me. I modeled a bunch of stuff then pulled in another model from the warehouse which I didn't like and deleted immediately. I then saved my file a closed it. I just now reopened it to find that everything I had modeled is missing but the filesize i still large so im hoping my work is still somewhere in there. I have linked to the skp file and I would greatly appreciated some help. It's extremely urgent! Also I'm on OSX Mountain Lion and would like to know if there is any way to recover an older version of this file, in case my work is not recoverable from the linked file?

LINK: https://www.box.com/s/2hz3na5sa68s4u3fn4yw