its very hard to find a 100 percent of what she released especially to list teh goodies pamphlet and photoboo, ; than is more than 10 years of work and some are extremely rare.
i use this one for her discography
http://ayumi.primenova.com/cdscans.php
this one fro ayupan
http://ayuwa.nihonwa.info/index.php?dmenu=ayupan
her pamphlet ( incomplete )
http://ayuwa.nihonwa.info/SCmag.php?dtype=pamphlet
her books (incomplete )
http://ayuwa.nihonwa.info/SCmag.php?dtype=book
a nation 2007 goodies
http://totalayu.free.fr/article.php?sid=56
this one have tons of photobooks scn and other pictures
http://ayuhamasaki.free.fr/galerie/index.php
those are just the scans and fan website ; if you want to buy ayumi goodies i know some great websites i will post the links later