Is there such a beast - switch that has both a single-pole switch and a
timer?

Why - I need a timer on the exhaust fan. Current config of nutone
bath-fan with 4 switches in a double gang box is:
* fan, exhaust
* heater
* light
* night-light

There is no room for more boxes. So, I have two choices to accomplish
this:
1. hot wire the night-light, which frees one box for a standard wall
timer
2. find switch that has both a single-pole switch and a timer.