The National Symphony in Washington will present the Kaddish June 2-4, link here.
The Washington Post has a critical prospective article by Stephen Brookes, May 27, "Samuel Pisar's 'Kaddish': A warning to a world out of control", link here. The new performance will have a different narration written and read by Holocaust survivor Samuel Pisar. Leonard Bernstein's own memorial website has an article on it here.
You can watch on YouTube a segmented performance of the Kaddish Symphony conducted by John Axelrod, CLC Productions with the Orchestra of Paris, starting here. Pisar's text is harrowing. "My life is not my own." Play it loud.