Quickest/best way to get some more Japanese strike aircraft into the game

[1984]

oh, these ki-44, i'm only recently understood about this very interesting plane (not bad performance if this true, especially, for serial production)... for a start, sensibly be version Ki-44-IIb, right? new p-40 + mustangs with allison + ki-44 + any chinese map etc... and ki-67, ki-43 and other planes, all japanese weapon, etc, how much need do in this game (good what sometimes it's easy)...