I'm looking for a 3rd valve for an old 3 valve Boosey & Hawkes Imperial Eb tuba. Serial number puts it around 1940-45. I'm helping out a school who a putting together a band program and they had a tuba with a missing valve! The instrument is in pretty good condition for its age. If anyone has one please get in touch! I'm in Sydney Australia but will happily pay for the valve plus shipping. Thanks in advance!