Still waiting for the booster
Nikon doesn't have the 4:3, checked even other models
Only 1:1, 3:2, 16:9
Is it something important or post cropping will help?
I don't know about Nikon's aspect ratios, but Sony camera bodies offer 3:2, 4:3, 16:9 and 1:1. I tend not to mess with that in the camera, and instead wait until I'm in an editing program to decide about cropping an image or changing the aspect ratio.