Top of page 13 in the new issue of NSR shows an announcement for a new step van.
The photo shows the model in two colors, and appears to be cast resin. Detail looks good. The model looks to be based on the Chevy Step Van of the late 60's and produced though the 80's. Many are still around today.
Spotting features include a split grill ("Chevrolet" would be printed on the bar) and two side stiffeners.
Grumman made an almost identical van with a different grill. That should be easy to change out.