Hi Nigel, I think you must have misunderstood me. I was saying that my platers had done a pretty fair job of re-plating the grille mesh, so it might be worth actually asking yours about it?
I believe that standard MMM style is 16SWG (1.63mm) with a 12mm aperture diagonal weave. Wovenwire can get close to this and do it in stainless steel if you don't want the expense of chrome on brass. They do brass as well, but not chromed. Tim