It is true that the printed books are hard to come by. And they can be expensive if you do find one.
Cynthia, or someone acting in her behalf, recently had some Crisis of Conscience copies for sale on Amazon at a very reasonable price. Apparently, they sold old quickly. There are, however, still some copies of In Search of Christian Freedom available from her on Amazon at the same reasonable price.
Regardless, even if there were NO printed copies available at any price, that would not justify downloading pirated copies of the PDF versions. They are still available at very reasonable prices from Commentary Press, and she (apparently) does benefit from their sale.
I hold that downloading pirated copies of either of these or any other of Ray's books IS stealing from his widow. If anyone wants to share these invaluable books with someone, he or she should purchase a separate PDF download with its unique password for EACH person it is being sent to, just like you would with a printed book you wanted to send as a gift to multiple friends.