I have a Lumma bumper fitted and it comes with metal mesh for the grill as you can see.
I fitted the GSI fog light surrounds and wanted the centre bit to match too but none are available that fit.
So I bought a Vectra VXR bumper grill and flattened it out. To flatten it out I cut halfway through the honeycomb bit on the back in the centre and heated it with a hot air paint stripper carefully untill it was the contour that I wanted. This is my first attempt but its not perfect as it went funny at the end.
I laid my template over the top and marked where I needed to cut the excess off.
This is what I ended up with.
This is with it just wedged half in the hole but not in properly.
Not sure if I like it now though