If you, the contractor, are configuring the webserver, then just install Apache and go from there. If they don't have anything that requires cookies (or other script-side header stuff), then they won't notice the difference.
If they do, cargo-cult their code and get the job done.
In general, if you think something isn't in Perl, try it out, because it usually is. :-)
"What is the sound of Perl? Is it not the sound of a wall that people have stopped banging their heads against?"