Ive seen some with nice chrome mesh in the grill instead. You can use a spare grill from a scrap yard, cut out the inside and then affix a mesh to it. That way you have all the fixings you need and it will be the right shape.
Massive recently debadged his Rover - The rover badge is rivetted on so he had to do some filler and paint to cover this over but I think he was happy with the end result.