Significant recent releases:

Choroszy Modelbud 1/72 FIAT Br.1. A resin kit of ing. C Rosatelli’s first bomber design.
Sem Models have released resin kits of the CANSA FC.12, IMAM Ro.63 & RE.2006 in 1/72 scale.
Special Hobby have been busy of late, releasing a range of 1/72 Caproni Ca.310 & Ca.311, 1/48 IMAM Ro.43 & Ro.44 and three 1/32 FIAT G.50 kits. All are highly recommended.
Silver Wings have released impressive looking 1/32 resin kits of both the FIAT Cr.32 & FIAT Cr.42.
RS Models have added a 1/72 SAI 403 to their range as a companion to their nicely done SAI 207.

In the past, good quality kits of Regia Aeronautica model aircraft were few and far between. Most could only be found via ‘garage’ or limited run resin kit companies (Choroszy Modelbud are perhaps the best source today for 1/72 resin kits). But it is thanks to, on no small part, the likes of MPM (aka Special Hobby) and Classic Airframes that decent injection-moulded kits became available, albeit on a limited run basis. Even Italeri have done their bit, re-issuing older Supermodel kits as well as all new models of some of the more well known RA aircraft.

There are a few, however, that could do with another look:
Caproni Ca.133. The Aviation USK 1/72 vac-form kit has been unavailable for some time.
Supermodels 1/72 CANT Z.1007 is an old, old kit with various outline errors that are difficult to correct.
Aviation USK 1/72 FIAT RS-14 (now OOP) had many serious errors.
Delta2 1/72 Savoia S.55X is a very poor, elderly kit. This iconic aircraft deserves much better!

The following, to the best of my knowledge, have yet to appear in kit form:
SAI Ambrosini S.7. A very attractive aircraft, especially the post-war ‘Super’ & ‘Sagittario’ variants.
Savoia Marchetti SM.91/SM.92 are interesting twin-boom aircraft prototypes, both based around the same airframe.
CANT Z.511. This was an ambitious 4-engined floatplane prototype which had a rare elegance.

Here’s my current top ten Regia Aeronautica aircraft and the model that I think best represents it.

  1. 1.Reggiane RE.2005 ‘Sagittario’...  Pacific Coast Models 1/32

  2. 2.Savoia S.79... Classic Airframe 1/48

  3. 3.Breda Ba.65...  Special Hobby 1/48

  4. 4.FIAT Cr.32... Classic Airframe 1/48

  5. 5.FIAT G.55... Pacific Coast Models 1/32

  6. 6.Piaggio P.108B...  Special Hobby / Flying Machines 1/72

  7. 7.CANT Z.1007bis...  Alphaflight 1/48

  8. 8.CANT Z.506... Alphaflight  1/48

  9. 9.IMAM Ro.44... Special Hobby 1/48

  10. 10. Fiat G.50...  Special Hobby 1/32