If you could live with a non-Perl-solution && you are using one of these in this abbey not very high ranked operating systems made in Redmond, you could use the synchronisation ability of the tool "Total Commander" http://www.ghisler.com (not included in those os'es - of course).

I use it to keep copys of working directorys on my usb stick up to date (and to ftp changed files to my web site).