I found the original broadway version of Tomorrow Belongs to Me on Youtube, which is almost exactly how I imagine it being sung here, but I won't link to it because the imagery used with the song is...off-putting. The title of the video is "Tomorrow Belongs to Me - Cabaret Original Broadway Cast" if you'd like to see it anyway.
I also have a 1-meg file of the song. If anyone wants to hear it by itself, e-mail me, link in my sig.