hi belle
I would suggest a site called abebooks, they have links to many , many booksellers all over the world.
I had been searching for a book that went out of print years ago and through abebooks.com i managed to buy it from a bookseller in Australia of all places lol.
Give them a try, good luck.
An old lady I know had been searching for a particular book for 25 years and I found it for her on ebay. A lot of secondhand bookshops advertise there, so it's worth a try.