Well I mean something like that, but it ONLY tells you for certain item ids that are in there inv, Kinda like how this plugin works for this server: http://www.drugcraft.net/wiki/index.php?title=Cops
Well... there's '/searchinv <Item> [MinimalAmount]', you could bind that to a stick that on left-click performs multiple searches for each item and give a custom output based on each one (possible with CommandHelper). Or... you could give more details in the plugin request, and request the plugin to be made. This looks like a private plugin to me, unless it's added in some existing cop plugin, which I would have no clue about. If it's not somewhere public, then reformat your post with more details and try to get a developer to make it.