I searched our collection and consulted with the archivist at Corning Incorporated, and was unfortunately unable to find any recordings of the CGW Radio Family Party show. I did find a mention of the show in this book, and a note in a 1942 issue of our local paper (top right), but neither mention the Koval Trio. I wish I had been able to find more for you - if you are able to track any recordings down, please let us know.