I know Toni, and I love Fairuz's singing ,but I think roger Bandali made this midi file for that song,he changed the arrangment very tastefully to put it to a 4/4
rhytym, it sounds so nice, and you are right about Najib Hankash,he even mentioned it once on the Lebanese show in the early 70's if you remember,
(Sahra ma3 Il madi),he said people think that I stole this song from the tune La Comparcita,(Tango) which it matches your statement.
Stephan.