The call you mentioned is no longer made. It was a wooden call made by Circe (Pre-Lohman/Circe).
Your best bet would be Ebay, but be prepared to pay big bucks for it. Although they are not extremely rare, they do command a decent price. Guessing I would say $60-$80 just for the call, and for one with the box and instructions, well you'll probably pay well over $120 for it.
Jay Nistetter could give you a better info on when it was made and such.
Todd