I took a body cap from my 7D and cut a hole in it. Then took the mount ring off of a Pentax K1000 Body, drilled a few holes in the EOS body cap and screwed the Pentax ring on to the body cap then mounted it to my 7D haha here are some pics.
and a shot form the lens it's self
I know the pics are not that great of the lens it self but they were quick snap shots