Based on recent searches, the following works by Tona Scherchen are available on CD collections today:
"Lo" for Solo Trombone & Strings - Available in the collection "Almost Home: Works for Trombone" released by Greenmill Records. You can find more details here.
"Shen" - Included in the collection by Les Percussions de Strasbourg, you can view the details on the Internet Archive here.
To explore more of Tona Scherchen's work on physical media like CDs, consider visiting platforms like Discogs, which offer a comprehensive list of available music by Tona Scherchen, including CDs and other formats. You can view her Discogs page here.
For additional purchases or browsing, online stores like Amazon might also have some of her works available for order.
Images related to her CD collections:
These sources should help locate the available works by Tona Scherchen on CD collections today.