#!/usr/bin/perl
# Untested!

use Path::Tiny;

my @files = ( ... );
sub find_files {
    my $filename = shift;
    my $path     = 'Path::Tiny'->cwd;
    my $file     = path($filename)->basename;
    if (-e $filename) {
        path($filename)->copy("$path/$file");
    } else {
        open my $OUT, '>', "$path/$file" or die $!;
        print {$OUT} "Unable to find $filename\n";
    }
}