I sent a letter and SAE with US Stamp on to the Stage Manager on: 30th June 2014, and today I recieved this signed programme book back from the show, and a note from the US Representative too , plus he added more postage too.
address I used was:
Stage Manager of ' Mulan: The Percussion Musicial',
La Mama E.T.C Ellen Stewart Theatre,
66. E 4th St,
New York
NY 10003
USA