This from Larry Shapiro:
Winnetka has a new unit for Ambulance 28. This was reportedly the second to last unit to be built by Medtec. It is a Type I on a 2012 IHC 4300 chassis and carries Medtec shop order #26264-1.
The previous unit assigned as Ambulance 28R was a 2000 Type I Road Rescue on a Freightliner FL70 chassis. That unit was sold to the Antioch Fire Department.