I don't.
That is why I said that the csv-script is a good basis. Naturally you can add the references to fields that you have in your files and delete those that you do not need. From the distance I cannot guess which fields you might need.
To treat lyrics in export scripts, see
Indeed, the export function usually only creates a single result file but that has the data for all selected files. That is why the filename should be part of each record in that file so that MP3tag can align data and target file during import.