For the Brain Geek Who Has Everything

This looks like a pile of wooden cubes with odd images on them.
 







Assemble them correctly, and you get a 3-D image of the brain...except
you can't see it when you are done...







...because the image is entirely inside.  



The real puzzle is this: Where do you get one?  I found it on
three sites ( href="http://www.odditycentral.com/pics/the-brain-cube.html">1
2
href="http://damncoolpics.blogspot.com/2008/11/cube-brain-teaser-puzzle.html">3),
but nobody links to the original source.