Tracks kindly provided by Jeff Kutcher, great nephew of the violinist Samuel Kutcher. The provenance is unclear, it is in the possession of the British Library, copy of which can be downloaded there.
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Tefilot Shalosh Regolim - Cassette
Jewish Education Committee of NY - Songs for Shavuot
Geoffrey Shisler - Nusach Sholosh Regolim Shovuos - HMK7
Barber Collection - Tape B513 - Nigunei Chasidi Belze - Shalosh Regolim - HMK7
Sawel Kwartin - Sholosh Regolim
Eli Lipsker - Nussach Hatefilo l'sholosh regolim - K7