done my manifold and exhaust although the exhaust is very simple 1 small box and side exit. i bought some bends (1.75 inch ID) and a 10mm thick 1metre length of plate steel for the manifold and some larger bends and strait lengths for the exhaust (2.5 inch ID) all stainless steel apart from the flange material. i found it a piece of piss to do the exhaust once i got the turbo in place, but the manifold took me about 3-4 sodding days to get right! getting four pipes to fit the turbo flange was a right head scratcher
got all the exhaust parts from a ebay shop, the manifold pipework from somewhere in north london, and a local supplier for the 10mm plate steel. will go look up there web site it you need, just let me know