If you're looking for the actual content/text of Bartholomew and the Oobleck, I think you may be disappointed. As TeacherGroupie has mentioned, his widow (and estate) are very active regarding unauthorized dissemination. As for the legality of audio recordings, I'm not going to go there. I honestly don't know enough to say one way or the other if they're okay.
On the other hand, if you're looking for lesson plans and ideas, try doing a Yahoo! search for "oobleck". I know there's a Wikipedia entry (did you know Oobleck is a great example of a non-Newtonian fluid?), and there's a lot of other stuff as well if you're willing to spend the time looking for it.
But, if you're looking for the actual physical book, try checking half.com, eBay, powells.com and Amazon if you haven't yet. Many times, just by checking those four sites, you can find books for pennies (before shipping, of course)!