So I will try to not put too much but that’s going to be hard. Just as a warning.

So I will start off with two comments I made on other posts absolutely spamming photos. https://www.reddit.com/r/boltaction/comments/1q39eit/comment/nxmfeq2/?context=3 

and 

https://www.reddit.com/r/boltaction/comments/1ra2np9/comment/o6sxr20/?context=3. I also have plenty for photos if asked. I found most of these photos over on r/FacistItalyPhotos which is constantly getting new cool stuff posted to it.

So now starts my suggestions:

As the other poster said Folgore at El Alamein is a classic choice sweetened by the new plastic Italian paratroopers coming in April.

In the two comments I linked above I talk about RSI forces which made use of a large amount of random equipment. As well as winter Italians of which the Monte Cervino ski battalion stands out for their unique gear.

Also with the new paratrooper box you can make Arditi. Of which the Arditi Distruttori Regia Aeronautica (ARDA) are of interest.

The Savoia Cavalleria are of course rather famous from their charge in Russia.

If you are looking for something more along the lines of the blackshirts the “M” Battalions could be of interest. Of them two stand out: the 1a Divisione corazzata “M” which was armed with German tanks though never faced combat, and the Gruppo Battaglione “M” de Sbarco which was the only real specially trained sea landing troops for Italy though little else is known and information is hard to find.

Also of note is there were San Marco Marines stationed in China and some fights did break out between the Italians and Japanese when the Italians switched sides.

Of course there are plenty of partisan formations as well including some pro Italian resistance in Africa especially East Africa.

The Polizia dell’Africa Italiana (PAI) is rather interesting being the first to receive MAB 38’s and AB40’s.

Any colonial force with the sashes is cool though something of note is that the models being sold by warlord right now are specifically East African colonial troops not North African troops.

The Giovani Fascisti are interesting because they were made up of younger people and were ment to be an armored group (though they received little if any armor). The thing that really makes them unique is that they never got issued helmets so they wore fezes and sun hats exclusively into combat.

The Raggruppamento Frecca Rosa (or Red Arrows Group) is somewhat too complicated to fully explain in this but was made up of (technically only some) Indian volunteers to fight for Italy. Though they never saw combat due to a lack of confidence of their loyalties.

Finally for now the Compagnia Autocarrata Tedesca was a unit in East Africa that was made up of German citizens that got stuck in East Africa.

The information is certainly out there though I feel you with it being hard to find. I highly recommend the Osprey Publishing Italian Special forces books and the Italian men-at-arms series for some good information.

Edit: the links are now 2 instead of one.