The CD, How Glenn Found His Sound (Sounds of Yesteryear DSOY918), was released in England in 2012.
As you can see from the cover, there are some excerpts from The Glenn Miller Story included. There are sections from two songs, I Know Why and Moonlight Serenade, as well as a scene from the film. Heard in the scene are Jimmy Stewart (as Miller), Henry Morgan (as Chummy), Charles Drake (as Don Haynes) and George Tobias (as Si).