Where are you all buying your special clay?

Where are all of you getting your various special clays? I did a search for Argiletz (even tried several other spellings) and could only find products that use it as a small ingredient, or "info only" sites. Then I tried going to http://www.cedarvale.net, a site recommended as a source in a message on this board, and that cedarvale url comes up not found. Quick survey: where are you buying your clay, and what brand did you get? Tweet