With cool addition of the Fiat 626,this thread could be interesting.
I keep in mind the devs have other prorities with BotB, but to complete the vehicles of Regio Esercito in NA would only need the 3 following vehicles and 4 static weapons (IMO the most produced/important for each category).
-M11/39 in Bardia
-Carro Veloce L3/33 or 35 in Bardia,Tobruk and Sidi Rezegh.
-Fiat 508 C.M. in Bardia,Tobruk,Sidi Rezegh (and Giarabub as static instead of VW).
-Cannone da 90/53 in Bardia (instead of FlaK 18).
-Breda modello 35 in Sidi Rezegh and Op. Hyacinth (in both airfield,could be used against infantry).
-Mortaio Brixia mod.35 as pick up kit and/or -Mortaio da 81 mm mod. 35.
-Cannone da 75/27 mod.11 and/or -Cannone da 105/28 mod.12.
About adding italian vehicles in Gazala and El-Alamein,I remember a dev. saying that adding new stuff to that maps would cause CTD. (that's why i don't include the Autoblinda 41, M14/41, and Semovente da 75/18).