finally found one archived recording of this arrangement from 1980. Not sure why they added the chant intro before the performance, but check this out...
About the North Hills Singers
The North Hills Singers is an auditioned ensemble that performs a wide variety of music, from classical and traditional music suitable for chamber choirs, to vocal jazz, contemporary a cappella, pop, and Broadway. The NH Singers can be found featured at each high school choral concert as well as out in the community, performing for senior citizen groups, church and business organizations, and at school district functions.
North Hills Choirs -- North Hills High School -- 53 Rochester Road -- Pittsburgh, PA 15229 -- 412.318.1400 x3047