I just tried unzipping mine and the file was corrput - the.obj file didn't survive a repair attempt. Maybe a coincidence or maybe the original was bad. I usually open (view the contents) zips when I download them but sometimes (with WinRar at least) you have to actually unzip to find a bad file. Too bad but perhaps they will resurface.

"Democracy is a pathetic belief in the collective wisdom of individual ignorance." - H. L. Mencken