Hey guys, I found this stuff on Ebay form a guy called Red Star Miniatures. Very high quality stuff and pretty inexpensive compared to MM Powders. He cut me a deal when I bought one of everything and the water effect he sells. He has a system that uses this stuff to make mud. I tried some on my Jeep and it rocks. (I am not affiliated with this guy at all). Do a seach for pigments on ebay and you will find his stuff. He also has a line of very nice figgys. I got all 6 colors and the wter w/ shipping for somewhere around $30.
Here's his web site:
http://www.redstarminiatures.com/
Hope this helps.
Ted