Here's a picture of the squares taken straight on ... ...you can see the headlight rings fitted in this pic too ...there is a little 'drain' hole at the bottom which you can reach the screw to screw them in place through ....
And here's a picture with the grille painted black except for the front face ... I like this one ...being moulded resin , these will be slightly heavier than an aluminium one but not as heavy as the old steel ones that S*mmio's and , strangely , Miglia's had ...
The grilles should workout to be about £45 ......