Hello. Our Canadian Ismaili Muslim Youth Choir is obtaining mechanical rights for an upcoming CD. Duruflé Ubi Caritas is on our repertoire. We have contacted the CMRRA in Canada who does not represent the publisher. We have contacted the publisher directy, and got re-routed full circle back to the CMRRA. If you've recorded this piece recently and know where we can acquire the mechanical rights, we'd love to hear from you. Thanks so much!