Here is a page devoted to the Divco milk truck:
http://oldcarandtruckpictures.com/Divco/

This is one that, for some reason or another, the xB2 brings to mind.  Ours is more boxy fronted, but the lines seem to have some mental connection.  A "chopped" Divco (like the Hot Wheels customized "Dairy Delivery") would vaguely resemble the xB2.

Note:
Little to no side or rear trim.  All the "trim" is the headlights, badge, and grill.
Also, the grills are either slat or diamond/mesh shaped inlets, both are shaped to fit the body curves.  Also, they are often painted within the body color scheme.

The rims are stamped steel, but in different shapes and some look to have stamped "spokes" in them.  They are also painted ANY/OR chromed.  Some are black, others red, and others made to match/coordinate the body paint scheme.
Many are also black with a trimmed or painted lip!
(Much like some of the "modern" rim trimmed steelies.)

Yeah not sure about similar lines, I do like the two tone white and grean paint job on the first model that they showed. That my look pretty sweet on an xB.

id like to get some big fenders and a running board to make it look like an old hot rod. Then offset the tires.

I would love to see a new car with fenders seperate from the hood area and have a split hinged opening hood. If I coud figure out how to make it work on the xB I would be all over it.

Something that might be of interest:
http://www.clubxb.com/forums/f69/gen-2-woody-kit-21617.html