It is possible to show "Other level 2s" information, i.e. the level 2 sites viewed before arriving on the currently selected level 2:
- select the level 2 site you want to analyze the sources of
- choose the Sources (Traffic sources) dimension
- select the necessary metrics
You will find Other level 2 information in the values listed for the Sources.
You can also directly filter you analysis on Other level 2s.
Once it is correctly displayed, you can export the data in a .csv file.