Can find welding goggles in welding cart

Adds a chance to find welding goggles in welding carts.  I'm not quite
sure how the chance value works in these so I just guessed with 30.
Does it mean 30% chance it'll be there?
Armored car rebuild

Redesigned the armored car.  Spiked plating on the front ram bars,
headlights moved, quarterpanels and boards added so it actually has
walls, and removed extra steering wheel.