Harvey, I took delivery of my '01 in March of 2000 after ordering it in January of 2000 (thus it had rear drums instead of disks but also 18 different accessories that were deleted with the '01. 5's). Yes, Chrysler clicked up the model year very early because of the Corporate Average Fuel Economy (CAFE) requirements. It was either pay a big fine or roll to the next model year. The PT Cruiser then came out to help them with their overall average. So, essentially, I have a very early 2001.
Perhaps my Jacobs was also an early model which didn't come with the switch? Another possibility was that there were actually two of these kits available at the time: One, the kit that came with a Jacob's part number; and two, the kit that came with a Mopar part number. My understanding was that both kits were identical though. I installed my kit myself so I had only the parts that came with the kit. Perhaps your dealer could have thrown in the switch as I did by purchasing it separately from the kit? Seems like a must have if you ask me.