I am building an S5 turboII motor to put into my REPU, but cannot find the right manifold for this project. Currently I have my Weber DCO carb with the upper intake manifold adaptor to fit a S4/S5 6-port lower intake manifold. What do I need to buy and where can I buy it to fit this to a turboII block?

Mazdatrix has the lower manifold to use my upper on an old school 4-port, but that wont be a direct fit. Anybody know of a similar manifold for the turboII block?

thanks