Library "Toolbar" Object

What is the likely hood of finding some source to create something that has the same functionality of the Library Toolbar in MMF2?

Basically, it works like Explorer, only it can limit the scope of the directories that are set and you can drag files. MMF2 can catch dragged files and use a filter, so this would be a great addition for application creators. I am kind of doubting that you could drag files INTO it, but that would be nice.

This would be very useful as I am sure some of us have had occasion to include a bar like that in our apps. I am not really convinced that Explorer should be updated as it has a different look and feel and functions in its own right.