Why is the text so tiny? D:
The item system here is kind of clunky and annoying so I don't mess with them too often. Pretty sure you can just use a page script to place the item in the player's inventory when they come to the right page, or otherwise have picking it up set a variable the links check for.
http://chooseyourstory.com/help/articles/article.aspx?ArticleId=66 may help, though it'd be possible (and probably easier) to bypass the necessity of the actual item altogether and just toggle a variable to track whether the character has it or not.
The Advanced Editor section would be the place to post these kinds of questions, just fyi.