That IIIG brings a tear to my eye from remembering the glory days of CMAK.
I wish there were L/42 and L/60 versions of the IIIJ, but the G and M late give a lot of possibiities.
Just doing a really quick test, I found that in June 1944 there were about 3 each per platoon, but in May 1945, there were some G43s but no G41s.
As I said, one very quick test, so YMMV.
Programming tactical AI responses in a game has to be the hardest undertaking in computer gaming. Strategic, not so much.
But, as has been proffered, if anyone ever programs an AI that can play a game like a human, we're all toast.