I actually have one of these in my collection, though without the base and aged finish. You could find them often on EBay a couple of years ago. I suspect Grady Stiles III made an original cast and the negative was commercially available for a time to hobby casters.

http://thehumanmarvels.com/?p=66

The Human Marvels wrote an article about Freaks years ago. Apparently, there are several versions of the film and its survival has a lot owing to the efforts of Anton LaVey, as in Church of Satan...

http://www.thehumanmarvels.com/2006/07/freaks-motion-picture.html

You know, for daily zombie goodness you should really check out www.zombiedaily.com .

Artist Rob Sacchetto, who was featured previously on Boing Boing for his zombie portraits (www.zomibeportraits.com)has been posting a daily zombie illustration for a few months now.

His podcast is hilarious as well.

Might I suggest visiting the remarkable

http://www.thehumanmarvels.com