I may not be reading into this question correctly, so I will hit both topics that came to mind. The top lid (for top loading) is already a griddle top. I am not aware of an official "grill" type drop in.Can you put a grill on it? Getting conflicting info from previous posts.
The part I am probably reading incorrectly: There is an available screen for the two front doors. I purchased one with my stove and promptly returned it without use.