Good news, everypony! NEStranscriber shared a very cool full instrumentation of the Find a Pet song. He says that he was trying to make a karaoke-type version of the song without vocals, and he did a great job.
You can listen to NEStranscriber's version in the video, or download an mp3. You can also check out sheet music for this version of the song here. Take a look or give it a listen—you won't be disappointed!
NEStranscriber also says that he's willing to share the garageband files with other fans who want to improve on his sheet music. You can find him on deviantArt.