Around here The Hispanic Folks call those metal plates Comals. They sell them at a Mexican store near My place for about $14.00. They also sell the propane burners but those can be had anywhere. I've been dreaming of an all-in-one BBQ rig that would include a bbq pit with an adjustable grill, a smoker box and a comal.
My fav hot sauce is Pico Pica. No vinegar!