Dr. Rochat,  About a year ago I found a steam calliope for sale
in Washington state.  The asking price at that time was $25,000.
The calliope is in need of repair.  The owner is:

  Bill Burhen
  Box 936
  Kirkland, WA  98083
  (206) 726-3002  phone
  (425) 868-3875  fax

Good luck!

Steve Grotenhuis
Science Museum of Minnesota