Nope. Neither of them completed full built; Both had the gun made, but the hull wasn’t made. As for the Zestorer, the original plan was to put it in a wimberblind chassis, but for test they mounted it on another anti-air chassis - Flakpanzer IV Möbelwagen.
And this version is the one in-game, even tho the real Zestorer should be a 30mm Wimberblind.
As for the Ostwind II, wait for my edit I need to find my post.
As for the Ho-Ri not reaching anything :
There was 3 possible Ho-Ri : 2 with the central engine (Ho-Ri I’s, 2 with the Chi-Ri hull (not the opposite !)
So there was the 105mm gun, the hull, but it wasn’t made for it.
The second mid-engine variant was with a slopped armor, and there was a wooden mockup built.
So the wooden mockup and the whole canon finished, this makes the most advanced version of the Ho-Ri.
Ho-Ri I, slopped armor
ho-Ri I, Chi-Ri hull

Ho-Ri II


Edit: I can’t find anymore my post, so here is the story quickly:
ostwind II
The main source of historian showing a prototype built is following this lead:
The prototype of the Ostwind II was buit at the Ostbau-Sagan workshop from Silesia (on the left: Silesia region as of 1939), Once the prototype was completed, it was, together with the improved Wirbelwind (known as Zerstörer 45, Eng. Destroyer), transported to the training center at Ohrdruf, in Thuringia.
Due to the Allied advance, the Ostabu-Sagan facility had to be evacuated to Teplitz-Schonau in occupied Czechoslovakia. This caused major delays and confusion during the Flakpanzer production.
Hilary L. Doyle have speculated that not even a prototype was built, alleging Germany’s almost non-existent industrial capacity at the time.
D. Terlisten (Nuts and Bolts Vol.13 Flakpanzer, Wirbelwind and Ostwind) mentions a report from Ostbau-Sagan discovered after the war that mentions that some turrets (plural, although the precise number is not listed) for the Ostwind II were completed. D. Nešić, (Naoružanje Drugog Svetsko Rata-Nemačka) mentions that one prototype was built and that a production order for 100 vehicles was given, which did not materialize due to the end of the war.
Following Terlisten, he states in his article that his source is Mr. Francev (Kořistní zbrojněná vozidla ve výzbroji čs. The Army (Part 3)):
He states that in the VTV (Tank Troop Command) report of October 1947, among the German equipment collected throughout the country, there was an anti-aircraft tank with a twin 3.7 cm gun on a Pz.Kpfw. IV platform.
Text is in >Documuent>20(3).
This is the exact lines. The translation goes to :
Along with the selection of ex-German self-propelled guns , three anti-aircraft tanks on the Pz.Kpfw. IV chassis were selected at the collection point in Milovice for repair and subsequent testing, since consideration was also being given to the use of the 20 surviving combat vehicles of this type (OPL — anti-aircraft — tanks based on Pz.Kpfw. IV) still preserved there. The repair was assigned to the ČKD plant in Praha-Libeň, to which three incomplete vehicles were sent on chassis No. 298/D (reg. no. 79.866), No. 323/D (reg. no. 79.867), and No. 320/D (reg. no. 79.865), which had been found in 1945 at the Kostany railway station.
-Chassis No. 298/D received an eight-sided rotating turret armed with a 37mm anti-aircraft automatic gun vz. 43N, thereby taking on the appearance of an Ostwind tank.
-Chassis No. 323/D (reg. no. 79.867) was likewise fitted with an eight-sided turret, but with a quadruple mount of 2cm Flak 38 (20mm machine cannon vz. 38N), giving it the appearance of a Wirbelwind.
-The third vehicle, No. 320/D (reg. no. 79.865), again received a 37mm PLK vz. 43N gun on a pivoting mount, protected on all sides by folding armor panels, taking on the appearance of a Möbelwagen.
No traces of an Ostwind II here, it was probably misunderstood, a translation issue, …
@jon_man1199 reached Hillary Doyle about the ostwind II and Zestorer.
According to the Ostbau Papers in his possession, neither vehicle reached the prototype stage. He pointed out that the Ostwind II would have required a much larger turret (the one in-game is actually too small), something that, by January 1945, German industry was completely incapable of producing due to the effectiveness of the Allied Bombing Campaign. As far as the 45 goes, he said it only ever reached the test-mule Mobelwagen trials.