Sorry to post again here so soon, but a couple of these just recently became available and there usually isn't anything available by him, the man from Pittsburgh without whom Costa Rica is absolutely unthinkable:
http://www.youtube.com/watch?v=A0eLfDebUlY
http://www.youtube.com/watch?v=xUI2GpXX3gI
w/Joe Negri:
http://www.youtube.com/watch?v=rVHHGrkp60E