It seems I mispoke when I said that Waukegan Public Library retired the last still-operating Gerstenslager in 2005 to aid Katrina victims. In fact, they have another that is still running. The Dinomobile is a 1973 Gerstenslager that serves exclusively elementary schools. According to Joseph Kalinowski, who has been driving her for the past 35 years, it has never needed a major part. This may make it the last Gerstenslager still running. If anybody knows of another, please let me know!
The last of the Gerstenslagers?