TreeClassChooser alternatives for IDEA 4.5

Hello,

Could you propose me some alternative for the TreeClassChooser, which I can use in the IDEA 4.5?
It occured that this class is not availbale in IDEA 4. IDEA 4.5 defenitly contains such component, since it is availbale via "Go To" -> "Class" menu for example, but how can I invoke the same in my plugin in 4.5?

Thank you a lot.