Orium Implement not in Character Builder

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The Orium Implement is listed as follows:
Lvl 5 Uncommon

The glyphs carved into this staff suggest its ability to recall mundane and magical secrets.

Price: 1,000 gp
Item Slot:
Prerequisite: Orb, Rod, Staff, Wand
Enhancement: +1 attack rolls and damage rolls
Critical: +1d10 damage

Power (Daily): Free Action. Trigger: You hit a nonminion enemy with an at-will arcane attack power using this implement. Effect: You can repeat the attack against a nonminion enemy within range that you have not yet targeted with the attack this turn.

Published in Vor Rukoth, page(s) 20.
This is listed in the Complendium but doesn't seem to be listed in the Character builder.  Does anyone know why?  Also, the Prerequisite says "Orb, Rod, Staff, Wand" does that mean that it could be any of those or is it definately a staff?