The cheapest place I found a Janspeed manifold was from a company called Edworthys. I would strongly advise you not to use them however, as they turned out to be utterly useless. I am still waiting for my refund some 2 months since I ordered my manifold. I think the best places to get parts from are the smaller companies, you will pay more but get a better service. You should give Fusion Motorsport a try. Just my thoughts.