I think that picture is an S12?
anyway, i have an s10 muffler which has been laying in my shed for a few years but it has twin tips welded on instead of the stock single tip
i have some HiTech headers from my old car still.. but i just chopped up the 2.25" exhaust that went with it so i only have the muffler and headers left (xforce twinloop s10)
i use www.partslocator.com.au from time to time. you need to register though. just search for the model and parts you are after and it will tell you which wreckers might have them.