Check out the Article Archives; Under the technical section look at the Brentwood,TN and the San Diego articles, they will both tell you about the Grand Vitara diff install. There is also one in Hagens section about making a stronger pinion mount that would probably help you with a Sami application. Check with Hawk about parts ( 1-888-samurai ) I dont think the shipping would be to bad, but it may take a while.
Zig