I doubt if "auto up" is only a feature of the switch; it's probably also an electronic module buried somewhere. For auto-down, the driver's door window motor has an extra "pulser" contact in it to operate the motor until it reaches the fully-down position.
Clifford Alrams has a $100 module (SmartWindows4) that gives one-touch up and down on both front windows. However it may need to be installed with one of their alarm systems. Check www.clifford.com for owner's guide and install guide.