MOSFET with Integrated Driver for Boost Converter
Is it possible to find an NMOS with integrated driver


No (bold statement!), I think this is a rare beast and there are a few reasons that spring to mind: -


To properly turn on the MOSFET (without damage) you need a supply rail of a few volts (maybe 5 volts) to no more than 20 volts and this instantly restricts application usage of such a device. 
The low end supply voltage (if a tad too low) might indeed cause the MOSFET to fail because it doesn't turn on adequately enough so, an extra pin for under-voltage lock-out (UVLO) would likely be needed and, if you look at a lot of integrated switchers, these are quite common. Not turning on enough would generate too much heat in many applications and burn the MOSFET.
The device would need to protect against a supply voltage greater than 20 volts else the gate source region could become damaged by over-voltage and, not surprisingly, many integrated switchers do have an internal linear voltage regulator and this usually means a Vcc pin to hang a power supply decoupler on. Can you see that you are beginning to adopt the fuller functionality of a proper integrated switcher?
To drive the MOSFET in light load applications requires a peak drive current to the gate-source parasitic capacitance of a few mA i.e. just enough current to adequately activate the gate without wasting power. In higher load power applications this has to rise to several hundred mA to avoid switching losses being too great. Now, you need another pin that sets this current appropriately for the application.
The majority of engineers that require a boost converter will not try and use a microprocessor as the "brain" because they recognize that trying to control duty cycle under varying load and input voltage scenarios is best left to an integrated switching device.


There may be other good reasons that people can think of.