IIRC, the VX did not come with any significant skid plates. Just the little tiny one at the center cross member, that is hardly a skid plate, more of a deflector. There is the one that is in the very front, which is also fairly flimsy.
All the other skid plates that you commonly see, prop shaft/transfer case/tranny come off of Troopers and can be found at any junk yard practically free. They are direct bolt on.