I think the binder you mention is the bound book. You don't receive a bound book. You are responsible for getting (or making) one yourself, which is simple. The additional package is all the books and reference material that pertain to the C&R license. You can absolutely make a purchase without that package, just make sure that you make photocopies of the license and sign the COPIES, not the original. Leave the original blank.
There is a very long thread on all things C&R. If you sift through all the posts, you should find some links to great resources, including templates to make your own bound book.