Unfortunately you won't find any more Rex 2 or Rex 1 powder available in the states. The Hungarian Government took over the Rex factory and all the powder that they make about 2 years ago...no more sales to the states.
Go on their web site and it will give you the story of the factory since WW11. The factory was shut down because of pollution. The fertilizer side of the factory remains but not the side that produced powder. Rex powder is not being made at all, for anybody.