Do dealers even order regular or extended CAB's anymore?

HMS Beagle wrote:
I don't think RAM or Chevy even make an extended cab anymore, only Ford. I searched the whole state (CA) and found 2

Not sure about Dodge as I was not about to scroll through them, but a quick search at Cars.com for "new" using the filter "extended cab" will get you 37287 hits of new on the lot extended cabs nationwide. GM's extended cab was changed to the "double cab" which is somewhere between the earlier extended and crew cabs for the 2015 model year.