$n=0;
for my $el (@products) {
    if ( exists $products[$n]{"Vendor Item ID"} ) {
        $m = 0;
        for my $el (@config) {
            if ( exists $config[$m]{Vendor} ) {
                if ( $config[$m]{Vendor} =~ /$products[$n]{Name}/ ) {
                    $url= $config[$m]{URL};
                    $url=~ s/\*/$products[$n]{"Vendor Item ID"}/g;
                    $products[$n]{TaggedID} = $url;
                }
            }
            $m++;
        }
    }
    $n++;
}