AZ Controller is not manipulating MIDI stream, it can intercept it or watch it, but not change. At least not directly.
The only workaround which comes into my mind is configuring TouchOSC fader as normal OSC and as the reaction on it send PB message to some software MIDI loopback (like LoopMIDI).
On release message (OSC), send OSC value (center) to the TouchOSC. That will more or less imitate PitchBend.
But for any practical purpose I recommend real hardware PB controller. Apart from tricky setup, the timing from TouchOSC based solution will be bad. In other words, even when you organize what you want with the software, messages with "lag" and "jitter" compare to real hardware.
