Don't know how many of these were produced, but I love flying the KI61 in game, a 30mm on that sucker would be pretty wicked...
https://en.wikipedia.org/wiki/Kawasaki_Ki-61
Ki-61-I-KAId: Interceptor variant with 2 × 12.7 mm (.50 in) machine guns and 2 × 30 mm (1.18 in) Ho-155 wing cannon.
