Thanks for posting that photo, Mr. Pickard. It's nice to know a stereo recording existed. Hopefully it will turn up one of these days. That score deserves the finest presentation possible.
I've long been under the impression that "The Big Country" was never recorded in stereo. As inconceivable as it seems that the score, at least, wasn't recorded in stereo, no one who has ever issued the original recordings has ever managed to turn up any proof that it was recorded that way...