I hear you man! but one person willing to pay $6-10K for a proven reliable system is not enough interest for anyone to bother.

I'm currently on the hunt for a short block, and slowly gathering information on how the 350Z kits are put together.
My only issue with building a reliable kit for the crossfire is the high compression ratio. If it CR was like 9:1.
I would feel an aftermarket kit would be much more feasible. but I'm not positive on this. I 'm still doing my homework and have several books I'm studying. The books I ordered are centered around chevy supercharging, so the SBC engines might have issues with detonation over 9:1 CR ,being that the older small blocks had a cooling system which would pull heat from the block first, then the coolant would flow towards the heads to further remove excessive heat build up.

Now I believe the crossfire 3.2 is a reverse flow head, so they are cooling the heads before the block. Doing so might just make it feasible to boost upto to 6 psi max without lowering the C/R. I hope!
SO as you can see I'm still in the idea phase right now, but I think a decent centrifugal S/C kit for the XF should run about $4,500. While the rest of the project would be left up to the customer for further tuning of the computer and what not.