I've been searching for an SATB setting of this psalm and this mystical one by Charpentier on CPDL (Paul Cienniwa, editor and arranger) appears to be quite doable. Has anyone every performed this? The optional last antiphon is the Requiem Aeternam so I imagine this would be be appropriate for All Souls as well as for the Twenty-Third and Last Sunday after Pentecost and Resumed Sundays after Epiphany.