You might install Module::Starter and the script module-starter from CPAN (which is a good idea anyway if you write CPAN modules) and just do

module-starter --distro=MassSpec --module=MassSpec::SVGIsotopeClusterGraph --module=MassSpec::ViewSpectrum --module==Lip...

You will then find a directory MassSpec with all modules and other assorted files with skeleton content, exactly fashioned to current practice.

Note that you can also select build system and a few other options with module-starter, best read the man page before calling it

If you want a direct answer, Search.pm should be in a directory LipcutElementsIO alongside LipcutElementsIO.pm. You might also look at the perl5 libraries in your installation where similar things happen, see Locale and Locale::Country