Pure Imagination arr. Brian Piper

Okstate Horns performance of Brian Piper's arrangement of Pure Imagination for 8 horns. This was part of the concert for winning the IHS54 University Ensemble Competition!
Horns: Jonatan Alfaro, Hope Ayers, Josh Bonillas, Madison Cano, Bella Eneff, Lucas Hamilton, Raquel Hernandez, Kloe Keuckelhan, Allison Ringler, Elizabeth Shuping, Annie Smith, and Cameron Taylor

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Is this arrangement published? If so, where can I order a copy?