GotGarlic
Chef Extraordinaire
It's sold here, too, but not as much as it used to be. We call it cake yeast. Note that the name doesn't mean that it's used for cakes, but rather that it comes as a cake or brick.
Red Star® Cake (Fresh) Yeast | Red Star Original
Funny - the article says "Cake Yeast is available in limited markets in the midwest and northeastern U.S." I did a search on their website and found 11 stores near me that carry it. So it's probably available in any fairly large market.