Hi, and thanks for your interest in my products! This grille wasn't designed to replace the Bandai equivalent, I'm afraid. The Bandai part (or parts since it's made in sections) is way too thick to be to-scale. With some effort you could probably hack and cut it to fit, but there'd be a gap between the grille and the Bandai rear nozzle-type grille, and I certainly don't guarantee this an option!
I don't see a huge advantage in doing so, however. The only advantage is that the Bandai rear grille has larger holes, and so lets through more light. The one I modelled after the Fine Molds rear grille has smaller holes.