As xdg said, the issue that CPAN distributions are all about modules is pretty recurring. For instance, that's why the easiest way to install the ack distribution (which comes with the ack script) is to say
cpan> install App::Ack
is a companion module that lives in the same distribution. Otherwise, you may take a look at the author directory with
cpan> ls PETDANCE
cpan> ls PETDANCE/*ack*
and hope to see something in the sea of released distributions.
Another option is to turn your script into a module
That amounts to a good piece of advice as it can make your code more reusable both as the script (for external users) and as a module (for fellow Perl programmers).