How do I make an "egg crate" grille?

Or does anyone make a kit for same?

Photoetched, e.g.

I have seen, in hobby shops, a sheet of PE grating that may work for many cars. It seems to be of a pitch/opening size that should work for a number of cars.

i saw a tutorial around the web somewhere. i’ll try to find it

in meantime, this might help:

cs.scaleautomag.com/…/1041347.aspx