PineappleKAKE has shared some resources for I've Got to Find a Way. I thought this song was a really sad and touching part of the episode, so I'm glad other folks are appreciating it, too.
You can check out a midi and sheet music of PineappleKAKE's piano version of I've Got to Find a Way. If you're looking to play this piece and sing along with it, then these resources are sure to help. Go take a look!
Many thanks to PineappleKAKE for sharing.