There is another possibility, since the office PCs do have Perl. Through the use of use lib, a Perl program can reference additional modules stored in an alternative location on the office PCs.

(You don't say what OS your PCs are running, but this works on any OS that Perl runs on.)

#!perl
use warnings;
use strict;

use lib qw( C:/OurPerlMods );

use NonCoreMod; # because of 'use lib' above, will find in C:/OurPerlM
+ods
[download]

Where you put the "alternative" library of modules isn't important. One possibility would be to a create a zip file with your program and the extra modules it needs. Then users would unzip it to where ever you tell them to and could run the program.

If your PCs are running MS Windows, you could create an installer using, for example, NSIS, which is an open source installer builder for MS Windows.