I don't believe Thorens ever had this title in their catalogue.
I do sell a new disc (Thorens/Reuge compatible) of this piece
(excerpted).  You can hear a simulated sample of the disc at
http://www.HensToothDiscs.com/Sounds/MoonlightSon.mp3

If you are interested, let me know and I can put it in my eBay
store if you like.

Regards,
Jack Perron
HensTooth Discs