It's come to my attention that the talented band and chorale groups at Adams State College actually recorded their performances. Below are the four I have located. If anyone knows of any other vinyl offerings from the school, I would love to know.
The earliest ones I could get my hands on date back to the late 1950s and early 1960s. The a cappella choir recorded an LP of a concert tour they took part in that year. The group traveled throughout Colorado, Arizona, Utah, Nevada, and California, throughout the month of April.
Adams State College A Cappella Choir
Maurice H. Skones, Director
Note of another release, Adams State College Choir, Maurice H. Skones, Director (Century V12258) 1961.
Adams State Choir 1969-70 Alamosa Colorado
(United Recordings UAS 561-50190). Randolph Jones, conductor.
The following year, the college's concert and stage bands produced an LP.
Adams State College Concert Band and Stage Band
Al Anderson, Director