Try www.abebooks.com I have found every possible listing of out-of-print books there. The ones you mentioned are listed. It's a website where used book stores from across the country list their inventory. They will also notify you by e-mail when new listings of the book in question are added. I have ordered books there from as far away as Alaska. I have also won a bet when I found a book there that someone thought for sure was unobtainable. They had 10 copies listed. They'll also list what condition the books are in, price, contact, first editions, signed copies, etc.