Show hidden files when searching in finder
Sadly, I never found a solution to this either. According to LifeHacker there is actually no way to do it except using comercial software. So the only other possible answer your question is 'use the Terminal' 


Open a terminal
Enter this command: 

cd &lt;your_directory_of_interest&gt;
Find the files with a name starting with a 'dot'.

find . -name ".*"
You can redirect the resulting list to a textfile by adding &gt; textfilename to the last command. Then use that file to do whatever you need to do with the files.