In your case probably the 

> mdfind

 will do great job.

It is not a GUI but a [Terminal command][1], and it will search everywhere and everything.

Once found you can triple click on the line (to select it) and Right Click and use the "Reveal in Finder".

  [1]: http://blog.superuser.com/2011/06/03/digging-deeper-mastering-spotlight-in-os-x/