A music only track would be a crazy idea....
Not possible, since the music and sound effects were mixed on the same track. There are some Filmation DVDs that do have isolated music/SFX tracks for some episodes, but no isolatable music-only tracks exist.
That's why it's crazy. Who knows if someone has a set of tapes somewhere with the music? Anything is possible. Not necessarily probable, but possible.
I don't for a minute believe it to be the case, mind you....