Passenger window is open about an inch, does not move up or down with either side's switch.

Door panel off indicates there is power to the right switch.
Where can one find replacement window motor/regulator for the right door? Mazda says they do not have.
Apparently none currently on Ebay.

(And as long as I have the panel off, are there any not-yet-broken door pull handles available? Seems like with all the 3D printers now, we could get some of these minor parts that Mazda dropped support on.)

 

Unplug the connector to the motor itself, should be 2 wires. Hook power and ground up to it and see if it moves. If you reverse polarity, the motor will go the other way.

It's pretty uncommon for the window motors to go out. This will tell you for sure if it's the motor or not and if it isn't you can get the window rolled up while working on it.

Dale

 

After Dale's motor test and it looks like the switches are good, take out the assembly and test it per t-von's excellent tutorial. I could be that the window glass or cable track is jammed. Taking out the assembly and testing it will give you a good picture of what is wrong.