Has the radio interview that she did with Mike Wallace in 1956 ever come out on LP or CD? I'll look into those ESP CDs...
BTW, working on this program has given me reason to re-visit Donald Clarke's WISHING ON THE MOON. It's a top-notch bio of Billie; Clarke was able to get access to Linda Kuehl's archive, although he encountered problems that certainly confirm Chris' post. I highly recommend WISHING, if you want to read only one Billie bio (Stuart Nicholson's book is also worthy too, if you're a real fanatic).