You might give them all a common package prefix and put the mapped name in a package variable. You can then grep that prefix package's symbol table. Consider:

#!/usr/bin/perl -w

package Helper::X;
{
        no warnings 'once';
        $ACTION = 'foo';
}

package Helper::Y;
{
        no warnings 'once';
        $ACTION = 'bar';
}

package Helper::Z;
{
        no warnings 'once';
        $ACTION = 'baz';
}

package main;
use strict;

print
    map ${$Helper::{$_}->{ACTION}} . " => Helper::$_\n",
    grep /::\z/,
    keys %Helper::;

__END__
baz => Helper::Z::
foo => Helper::X::
bar => Helper::Y::
[download]

Update: added Helper:: to the output. Note: be sure, of course, not to put any packages that don't contain a helper class under the Helper:: namespace.

Makeshifts last the longest.