I first wrote about Mel Birnkrant's Outer Space Men here in a post "Inspirations". It's a toy line from the late 60's that has been revived by The Four Horsemen. The figures they made are modular. You can mix and match pieces to make new characters if you choose. For fun, I photographed the bodies and applied my own sensibilities to a new set of heads.
The unaltered toys below, (they are about 3 3/4" tall):