Unfortunately, there really isn't that much variety of Moria goblins out there. The only one I know of, and you might have found, is this
http://dramatickatastases.blogspot.com/ ... abel/MoriaGo through that you can find several different colored warbands.
Myself, I went with the classic green skin, red clothes as it was simple for the large amount of goblins I had.
You might want to look at the new contrast paints GW has and see if that gives you any ideas. Look at how warhammer orcs are painted for other inspiration.
Good Luck!