Apparently, it looks as though the Wizard Edition for Ni no Kuni was only available for a limited time for a particular "Limited Edition" game case. Ordering the game through Namco's site I believe was the only way. Here's a topic I've stumbled upon where some people have been discussing the Wizard's desire for availability.
Yep EB never carried the wizards edition. If you pre-order through them you get a steebook case though.
I managed to order the wizards edition and it was a limited time thing through Namco's website only. They were holding a Nino starter event that would increase the items in the edition if they hit certain pre-order numbers. I forget how many tiers were hit, I think two. I will forever be extremely curious as to what were in the other tiers.