Well, if you're talking about the grill itself, not the burners, I would talk to a welding shop and have a new one fabbed out of stainless steel. Seems it would give a nice bespoke look..
As far as the burner pan, maybe you can remove and buff it up good, maybe a coat of high heat paint to set off the shiny stainless grill?
Let us know...
'12 F-450 Lariat
05 KZ 45' Escalade Toy Hauler
00 Harley Road King, 94 Dyna Wide Glide, 83 FXR