At http://cpansearch.perl.org/src/MIKEB/Spreadsheet-XLSX-0.15/lib/Spreadsheet/XLSX.pm i find

sub __load_zip {
    my ($filename) = @_;

    my $zip = Archive::Zip->new();

    if (ref $filename) {
        $zip->readFromFileHandle($filename) == Archive::Zip::AZ_OK or 
+die("Cannot open data as Zip archive");
    } else {
        $zip->read($filename) == Archive::Zip::AZ_OK or die("Cannot op
+en $filename as Zip archive");
    }
    
    return $zip;
}
[download]

which seems to suggest that you can pass a open filehandle instead of a path to new. You may want to open the file yourself and pass the filehandle instead of the path. something like

  open (my $MYfh,'<',$MYpath) or die "cant open $MYPath @!";        
  my $excel = Spreadsheet::XLSX -> new ($MYfh);
[download]

Or including info from http://search.cpan.org/~rboisvert/Win32-LongPath-1.03/lib/Win32/LongPath.pm

  my $MYfh; 
  openL (\$MYfh, '<:encoding(UTF-8)', $MYPath)
          or die ("unable to open $file ($^E)");
  my $excel = Spreadsheet::XLSX -> new ($MYfh);
[download]

Just an UNTESTED thought

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