Mussolini was a syndicalist, and most of these movements looked up to socialist theorist Georges Sorel as an alternative to orthodox Marxism.
Sorel's Reflections sur la Violence
was a textbook.
The Nazism-skeptical German right wing jurist, Carl Schmitt, wrote an excellent book about the anarchosyndicalist emphasis on myth and culture versus the orthodox Marxist emphasis on "science" and "historicism."
But I must ask one non-hostile question: do you see any connection between this syndicalist/fascist corporatism and the ideology of the Catholic Middle Ages or of Rerum Novarum?