Power window switch
 

I have a 1998 E350.

The power window switch on the driver's door that controls the passenger window will only roll the passenger window down, not rolling it up. The switch on the passenger door will work the window both way so I know the motor is fine. My guess is that switch on the driver's door needs to be replaced. However I went around a couple ford parts website and can't find a part for this. Does anyone here know a good source/site for parts?

Thanks,

Jim