Yes, I'll second Kevin's recommendation of Karas' "Music in Terezin." You can find several of Ullman's works in the series "Silenced Voices" from Northeastern CD, and also in the collection "Terezin: The Music" from Romantic Robot (a British concern). A web search revealed a performance of one of his works a couple of years ago in Montevideo. Aaron J. Rabushka [log in to unmask]