The World Sephardic Library is a great source for ספורים that may no longer be available elsewhere. It's where I purchased my copy of כתר שם טוב, and they carry copies of the Livornese prayer books: Tefillath Hahodesh, Beth Obed, Beth Menouha, Zechor leAbraham, and Moadei Hashem. You can even find such gems as Pahad Yitzhak. http://wslibrary.net/catalog/index.php