What's up Clyde,
I found a few other sites that may be decent sources for asking about the interchangeability of Trooper and VX suspension parts.
www.mwior.com -- Midwest Isuzu Offroad.
www.4x4wire.com is an all makes board, and it's been said that it has possibly the best isuzu tech forum.
www.planetisuzoo.com is another isuzu board.
Parts and tech can also be obtained from:
www.independent4x.com (Matt)
www.darlington-offroad.com (Joe)