You can find some sellers on Amazon selling the import but its usually way more expensive than it should be.
Ebay is also another option.

There are also sites like J-list, Otaku.com, etc that sometimes get Square Enix Merchandise in stock or will take requests from their customers for certain items. Keep in mind they usually add a small fee to the item or sell items for slightly more than the e-shop charges.

I can tell you that 2 weeks ago I was in Akihabara and even they were sold out of the Peridot Carbuncles. The only ones remaining were Topaz Carbies. As for the book, that may be a little bit easier to come accross. For example through sellers on Amazon. http://www.amazon.com/FINAL-FANTASY-...=Art+of+Eorzea