lou harrison piano concerto with gamelan orchestra

[crazy for ivan moravec]

my friend has been commissioned to study the concerto for and piano and gamelan which should be performed next year as a Philippine Premiere. i wonder where i might be able to acquire this score.. is it still in print? and what is the exact title of this concerto?- piano and gamelan concerto?
so far, what i found in the internet results are other stuffs like violin, cello and gamelan concerto. we have the score of the piano concerto but it's the handwritten one, and i think it makes it even more difficult to study since it's not so visually easy. if you have links as to where to get the music, pls post it here.

thanks so much for all your help.