for the price, ebay is your best bet. i hate to say it. especially when you need to be shopping for bends and such.

otherwise, you could measure the size of the pipe you already used and hit up an exhaust shop for some stainless. it wont be polished/chrome but it will better metal than the ebay piece. expect $20-45 a foot for the pipe and then at least $10 a cut, bend and clean edge..