Also, you might try(let's see if I remember how to do links) Addall.com which is another thing like bookfinder, only they search at least 20 bookstores.

I have v.4 of the Child books, and a compilation of the whole set in one volume. Whatever good that is! They are expensive. But since I usually find all my good songbooks at cheap-o booksales, I have hope that I'll eventually find the others.

Jen