http://www.a-aironline.com/detail.aspx?ID=2057

If you could install this entire compressor yourself and take your VX somewhere to get the system charged or whatever, you might save some dough. I think the shop would charge more for labor than they would for the parts you need so do as much labor as you can yourself.

http://www.junkyarddog.com/ Check this place out as well. It searches all the participating junkyards in the country for the parts you need. You might have better results if you say you have a Trooper, not sure. Good luck!