i havent seen many guys on here with aftermarket grills, and if there are they are mostly 4th gens. I too have been curious about 3rd gen options. but it's not on the top of my to-do list so I haven't researched it much. I've only googled pictures to get ideas.
I had an RBP 2-pane RL grille on my '07. You can look at my sig to see pics. I've been trying to sell it locally since the truck was wrecked but it's been a slow process.