you could look towards a local performance shop if you cannot find a prefabbed one, i know a local shop here where im at that could make a SICK intake manifold, i have seen the ones they have made on their shops evo, using velocity stacks,porting and all sorts of other tricks, BUT at $1100.00 money im just not willing to drop..
Damn that sucks! I was looking into getting one when I went to Iraq in March , chitty. Now I'm going to have to shop around and see if I can get someone to make a nice manifold for me.