I got drawn onto your Tournier / Buddha thread then 2 of my entries here in Harp Column seem to have gotten deleted when I updated them and nothing shows since even when I tried a third comment.
Anyway I found these, below, and was about to suggest you contact Elizabeth Fontane-Binoche if you have no other leads.
Rêverie De Bouddha | Marcel Tournier – Wise Music Classical
Tournier, Marcel, 1879-1951. Rêverie de Bouddha : transcription pour chant et harpe / Marcel Tournier. – View Resource – Social Networks and Archival Context (snaccooperative.org)