Shane, I'm not sure why you are having difficulty finding material. The commercially available CD will provide you with most of the songs used, both specially written for the film and previously available, plus the film credits (and the BBM: Story To Screenplay book) lists other material, some of which is not available anywhere as far as I know. Anything labeled Mastersource falls into this category. Googling Mastersource will explain.
Put all that together with what you already have (which is all the music, as opposed to songs, composed for the film, and which I see is listed alphabetically rather than as it occurs) and you end up with as complete a soundtrack list as you are likely to get.