Grill Blocking

I need help.

I remember seeing in a grill blocking forum a lower grill cover that had 5 holes in it that could be plugged or unplugged when needed. I have since searched every forum that contains the words "grill" and or "block" with no results. Does anyone remember this post? I would appreciate being pointed in the right direction.

Why not use foam pipe insulation you ask? I currently have that and just am not fond of the look of the lower grill as is and am too lazy to cut it individually. I have it in the top grill and am OK with the look.

THANKS!

 

That's it - thanks.