Stillen and HKS make some superchargers. A bit of custom work is required to get it all mounted and working, but that is basically the same for all of those systems other than mass produced kits. Any good performance shop can do the work, oddly enough there are lots in southern California (where smog laws are toughest). Some places even have modded versions they do of the HKS for more power.
http://www.gtmotorsports.com/search.php ... rch&page=1
(hopefully that link brings you to the supercharger page for the VQ35DE engine)
http://www.gtmotorsports.com/product.ph ... ctid=16769
