Where is the music in the trailers located in finder?

I am currently running the latest version of iMovie just so everybody knows what version I'm running in case it depends. I am making a project in which I would like to loop the music from the "Documentary" trailer preset more than once. I googled my question and I found two answers that both said to look in the iMovie "Resources" folder. I couldn't find ANY of the trailer preset music in this folder. Does anyone know where they ACTUALLY are?