Good luck. I think you will find that companies are going to be very resistant to creating one-off products like a turbo for your 370Z. They may have one that already matches well the flow characteristics of the 3.7L. I can't speak for them. The other thing to remember is that unless you have an unlimited budget, trying to go out and do something "unique" is going to be tough. There is a reason that people go for well designed kits like the GTM/Stillen kits. Just chat with some of the other members here that have tried to do unique builds and get their perspective on the process.
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Car Sold! Pleasure being a part of the Z community. 
New ride: 2015 GT-R - 647 WHP / 641 WTQ (e85) & 543 WHP / 519 WTQ (91)
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