The best way to obtain pFUnit is to clone pFUnit from the git repository from SourceForge as follows.
This will create the directory pFUnit in the current working directory.
You may also visit the project page at SourceForge and download the source tarfile "pFUnit.tar.gz" there.
Extracting this tarfile via a command like
$ tar zxf ./pFUnit.tar.gz
will place the pFUnit files into the current working directory.
For other ways to acquire the code visit
or contact the pFUnit team.