First, pictures and what vehicle is it?
1/2 plate is some pretty heavy material. Do you really need that?. Heat wise I assume you mean the console and not the 1/2 plate. Is the console just a storage box? Do you use it for an arm rest? do kids climb on it going from front to back? Do you need the top to be padded? How secure does it need to be?
These are questions you need to ask your self before you draw up a design.
I've built consoles out of wood, out of 12 gauge steel and seen quite a few steel aftermarket ones. Can you work metal or wood?
Look at
tuffy consoles. There's several manufactures out there. Look to them for design ideas.