Eyes Follow Mouse off stage

So, I figured out how to make eyes follow the mouse on the stage, thanks to this neat little tutorial -> Example

But since I need the eyes to follow off stage as well (banner ad) I have been looking high and low with little luck until now…

This guys cooked up a way to track the mouse off stage with the help of AC3 only -> Example

My questions is, is it possible to mix these two together? And how would I go about doing it?

Hope it makes sense.

Thanks