Views No Results: Show Block Instead?
There is a module that exposes blocks to the view header/footer and no results. It's called the Views Block Area.


  This module exposes all available blocks as a views area. This way you
  can add any block inside a footer or header from your view.
  
  Blocks that are generated by views, can't be selected. These blocks
  can be inserted by views areas.


This is also only for Drupal 7