How about these?
http://en.wikipedia.org/wiki/Family_...tical_Vehicles
It looks like they entered service, IRL, before '96, so one might encounter this line of trucks in either T2K timeline. If you do a Google search for images, you will see a few "gun-truck" versions with armored cabs and weapon station. One could easily set up some armor panels around the bed and add a couple more GPMGs and voila!