I am wanting to make some pictures for some UFO related stuff I am working on, and I need to find some decent grays to use. Know of any?
Both have additional content you can purchase as well.
There's one on most-digital-creations...
Are you looking for Genesis, earlier or any?
If you're using M4, I would suggest Grotto's Gray Alien (http://www.renderosity.com/mod/bcs/grottos-gray-alien/87836) -- it even comes with a cool U.F.O. prop.
For Aiko3 - http://www.daz3d.com/shop/mylilalien
Its on sale too.
There are several alien heads in the Creature Creator morphs, if you're using Genesis. There's also an alien head in one of the other morph sets, but I don't remember which one.
I've got the K4 Gray Alien and really like it. I had to pick up a few outfits for K4, of course. There is a body suit with some nice textures that I use. Also, one of the outfits has cowboy boots that I like. I'm still looking for a good space helmet to use, but I've found a few that are acceptable.