I have a typical 3 burner propane stove in my RV. What I would like to do is find a piece of metal that could cover the entire surface and when I cook there, I could heat the whole surface, using the 3 burners, and use the whole surface for cooking. Much as the cooking surface in many restaurant kitchens. I've just gotten back from looking for something like this in the stores. No luck. They have one that will cover 2 burners. And I even thought of using some kind of baking pan, but can't find anything the right size. Ideally it would be 19" x 17".
Does anyone have an idea where I could get something like this? Even the right type of metal, cut to that size would work. A small lip on the edges would be nice to keep things clean easier, but isn't absolutely necessary.