Tracking down the family airplane

[dangerboy]

My father owned a 1967 337B w/ the registration N2321S. It was based in Idaho Falls ID when he owned it. He sold it some years ago, I believe around 1986. I have searched every database I can find to figure out the whereabouts of this plane, but so far I've had no luck. The aircraft was white/yellow w/ black trim. It was a great airplane of which I have many fond memories, and was the airplane in which the flying bug hit me as a little boy (I now fly professionally). Any help tracking down this part of my past would be appreciated!!