It all depends on how much you want to spend. The local muffler shop is the cheapest and fastest. They can do it while you wait. The next would be through an nation wide auto parts company like NAPA etc... It would have to be special ordered and could take up to a week to get, and then you would have to install it your self or pay the muffler shop to install it. Lastly and most expensive would be a restoration exhaust system ordered through a restoration parts suppliers like TTI ( the best but most expensive), Year One , Roseville , ECS , Classic Industries , Jeg's , Summit , etc.....