well, my take on this is that you want to make a replacement fibre glass item for you centre console, is that right?
if so, my opinion is that you should take the original console (will be used as a 'plug') out and make a mould off it. The Plug is used to base the mould around. You would need to make two pieces to the mould, one off the underside of the plug and one off the top side of the plug, when constructing the actual product the fibreglass would be layed into the middle of these halves and then the moulds would be pushed together.