On a rather prosaic note - I need three black mineral fiber acoustical ceiling panel products for a public bid project. CAC is the most important consideration in this application. I have only found an Armstrong and USG product. Does anyone know of another one?
Have you tried Halstead Ceilings and Walls?
http://www.toptileceilings.com/mineral-fiber/
When faced with a need for a third manufacturer on rigidly enforced public projects, I frequently rely upon Acme Manufacturing. It worked for Wiley Coyote; should work for plan review.