If you find this, I've looked at centrifugal atomizers, ultrasonic atomizers, and the issue with piezo-electrics is they have the wrong Hz to generate the 5-50 micron range, absolutely no luck sourcing any that have droplet size details other than a precision piece of cleaning equipment. If you go to AgriHouse, Richard Stoners company, they have TRUE AEROPONIC UNITS, being TRUE in that this is the guy that pioneered the technology who worked with NASA to define everything we're using, BTW he also made the AeroGarden, so NASA let him cash in real well. AgriHouse sells the current generation of Genesis machines, they're around 5K per unit, w/ a minimum order of 10 units.
The above in mind they do have a feature list on the website, and a lot of details of the machine its self, provided below
Genesis V L-1
26 Jets
Lateral Spray Jet Configuration
Accumulator
Hydro-Controller
Digital Timer
Effluent Return
Stand
Reservoir
Reservoir Filtration
Growth Supports
Expandable
Hi-psi Pump (80-100)
Reservoir Frame
Effluent Filtration
Thermo-Sensor Subsystem
Fail-Safe Sensor Subsytem
Auto-refill Sensor Subsystem
Pre-filter Subsystem
R/O Filtration Subsystem
Auto-refill Solenoid Subsystem
Reservoir Overflow Protection
Effluent Bio-Filtration Subsystem
It may be wiser to try to DIY the complete system than try to reinvent the wheel, to throw away all this research they've pioneered and then re-labeling hydroponics as Aero is not going to advance the hobby market at all.
Beyond that, some helpful ideas, air powdered aeroponics has the added advantage of injecting additional fresh oxygen to the roots, gravity feeding your nutrients inline could accomplish this. If anyone who is still interested in this topic sees me posting please MSG me if the discussion has moved.