If you insist on displaying the Isuzu logo and don't really want to modify the stock grill....just tie the logo to the grill in several spots with a strong see through fishing line. I have cut out and inserted grill mesh in the stock locations and used the fishing line to hold it all in place. This has survived high speed runs on many occasions and has even stood up to the harsh New England weather for over 2-3 years now.

Just a thought

here's a pic of the mesh I'm talking about



The fishing line worked very well for this and is barely noticable to the eye unless I point it out to you