Does anyone know if the instrumental background music can be found anywhere online? 

I'd love to know who the composer is of the sad violin/piano pieces, they are beautiful.

For k osts you can find instrumentals for songs, might not be for all the tracks tho. If you check "song credits" on spotify, you'll find the producer and performer if listed. Hope it helps :)

I found a playlist on spotify with all the songs added. It has instrumentals too. Check it out.

https://open.spotify.com/playlist/4g3wOXXBoYtP2xyjUeC0L7?si=Zm8aVGlaQPmS4dZJk-efgQ&pi=ateEVSP6QjKa7