[Gargoyle]

Try r/classicalmusic and mention the reward. Lots of students and professionals there.

[StavrosK]

Already did, no dice :/

[Gargoyle]

Hmm. Maybe try to contact someone at KUSC, the Los Angeles classical station. Particularly someone like Jim Svejda, who knows classical and film soundtracks inside and out. Maybe donate the reward to the station if they can id it. :-)