I use NX3 every day at work but don't have a good 3D file of an XJ, though I've been looking for one. I made a post about it a while back and someone sent out a 2D layout of the front, side, and rear but it wasn't good enough to do any kind of design work with. If you make one people will love you for it, I'm surprised after all these years someone hasn't already done this (and gave it out freely).