Have you seen the post over at IFSJA about the guy in Vancouver WA with the truck he claims is one of five built for the forestry dept? It' looks to be the real thing and the first I've heard of produced for the US market. We know they built them for the Australia and Sweden, actually I think Australia built their own with the parts supplied but this is a pretty cool discovery. This particular truck has been updated with what looks like J20 axles and a Saginaw PS box.
Here's the thread on it over there: http://www.ifsja.org/forums/vb/showthread.php?t=114197
Here's the forsale thread: http://www.ifsja.org/forums/vb/showthread.php?t=114199