I've never spent any quality time with a GV, so I don't know how drastically different the mounting system is, but I have a 2WD C6 adapter for a U.S. Gear unit. Might it be possible to take that and engineer an adapter for the GV using that as a template for the tranny side?
I don't want to sell mine (I don't know if I'll ever want to use it, but would like to keep the option open), but I wouldn't be opposed to letting you borrow it to make a template...all I ask is that it be returned at some point.
Probably not worth the trouble, but there if you have any interest...