Exahust manifolds
that shouldn't be too hard to find. swap meet ,ebay, or junkyard. only thing that you need to know is the p/n of the bad one so you will be able to get the correct style for you year car. that is if you are trying to keep it original. if you are really picky you will need the p/n and the remember to get the casting date code correct. that way it will be date matched for your cars build date.