That's a very minimalist list of places you can get Yogi Tea. I've even found it (though usually a rather minimalist selection) in Holland and Barrett.

Let me know what sorts you are looking for, and I will see if they have them when I go to the organic grocer's tomorrow.

NB when I did a search on Yogi Teas recently I did discover that the kinds of teas available varied quite a bit between N America and Europe.