Found this kit for 240SXs, looks like they have a 1/2" adapter plate that bolts between the manifold and supercharger. That would probably be best so it keeps the height down. However, on the 240 the manifold goes down so the supercharger ends up sitting next to the block.
http://www.ka24der.com/ The Xterra uses a M62 supercharger. Mini S uses an M45. Mercedes C230 Kompressor also uses an M62. Cobalt SS uses a M62.
Problem is that that superchargers uses by manufacturers are roughly the same but there are differences in the mounting locations and inlet/outlet ports. Most all of the manufacturers design their own housings for the superchargers so you'd have to design the adapter to work with a specific one.