Unfortunately, I haven't came across a book on late Pz-IIIs. But if you want to free some slots (does it not spoil scenarios?), I've made a study on early Pz-IIIs from Jentz books
I've learnt much on these tanks on the occasion.
I'll list them in chronological order, rather than numerical:
352 PzKw IIIa/d - hull and turret sides and rear had 14.5mm, so maybe armour should be 2? (now 1). On the contrary, turret front had 16mm (now 4).
They were withdrawn from combat units by spring of 1940 (now: 8/41) - apart from "some" tanks of PzAbt z.b.V.40 assigned for special operations in far North starting in summer 1941.
As I wrote, proper picture is 27514.
Maybe two CMGs should be replaced with a paired weapon 154, like in Pz-I?
404 PzKw IIIb/d (s) - there's no info on any strengthening of their armour, which should be as above.
In this case, maybe 352 should represent Pz-IIIa only, which had the same data, but very different look?
BTW: Jents wrote, that HE round for 37mm was adapted as standard issue in Feb.40, but I don't know, if it means, that there were none before.
279 PzKw IIIe - first IIIe appeared in 1/39, with significant deliveries from 7/39 (now: 6/40), and were used in Polish campaign.
Turret front was only 30mm (now 5). Rear hull of E/F was 20mm slightly sloped - up to 30deg (now 3) (it should differ from Pz-IIIg, which had 30mm)
All 37mm-armed Pz-III should have a twin CMG in a turret (refers also to tanks below).
07 PzKw IIIe-3.7cm [variant with sabot ammo, first date 6/40 OK] - armour as above.
Radio code 82 is incorrect (for the French campaign at least) - IIIe wasn't a numerous variant (only 96 made). In fact, its data should be identical, as #583 IIIf below.
583 PzKw IIIf-3.7cm [variant with sabot ammo] - sabot ammo was officially accepted in 6/40 (now: 7/40). In fact, PzIIIf without sabot appeared in 10/39 (or even a bit earlier), but this period might be as well covered by 279 Pz-IIIe.
Radio code might be 82 - it was the most common variant during the French campaign.
Notes on armour and twin CMG as above (as IIIe 3.7cm).
They were used until early 1941 at least (now 9/40) (last were produced in 7/40)
As I wrote before, proper picture is 4.
584 PzKw IIIg-3.7cm [variant with sabot ammo] - sabot ammo was introduced in 6/40 (now 9/40) (first IIIg were completed in 3/40, though). They were sure used until early 1941 at least.
Turret for 3.7cm was identical, as PzIIIe-f, with only 30mm in front (now: 6).
There's little difference from 37mm-gun E or F - only rear armour was increased from 20 to 30mm.
08 PzKw IIIf-5cm - turret front of early 5cm variants was only 35mm (now 5), rear hull of E/F was 20mm (now 3). First date 8/40 is OK, last might be early 1941.
579 PzKw IIIe-5cm - armour as above. It seems however redundant, since it represents PzIIIe retrofitted with 5cm gun, while they were identical, as late PzIIIf, but relatively rare (only 96 basic IIIe made). They started to be converted from 12/40 BTW (now: 8/40).
It could be changed to uparmoured Pz-IIIF or G, used from 12/40, with additional 30mm front and rear plates and possibly 50mm mantlet (armour 6/3/5/5/3/3/2 in case of F or 6/3/6... in case of G). We have however uparmoured Pz-IIIh.
If it's deleted, 07 PzKw IIIe-3.7cm could be renamed simply to IIIe.
09 PzKw IIIg-5cm - first Pz-IIIg with 5cm were accepted in 7/40 (now 9/40), and it's worth to make them first available 5-cm variants. I don't know however, if sabot for 5cm should start so early (389 PzKw IIIf-5cm with sabot starts at 1/41)
Front hull armor was only 30 (now 6), turret's - 35 (now 6) - only from the end of 1940 they started to be fitted with additional plates on hull front and rear. Only late production tanks were given 50mm mantlet (it isn't known exactly when)
PzKpfw IIIh is rather OK, although turret front was only 35 or 50 mm (now 6)
Michal