Kyai Tirta Rukmi is alive and well! It is mostly used for Sundanese gamelan, but we play Javanese music occasionally.
Website:
http://www.ucis.pitt.edu/gamelan/
http://www.music.pitt.edu/gamelan/
Andrew N. Weintraub
Chair and Professor of Music
University of Pittsburgh
http://www.pitt.edu/~anwein