Thank you, Grizz, this information is very helpful.
Between the videos by crypticcricket and the guidance of Esstee, I am seriously considering making my own generator.
If I do not put together my own setup, I may just buy the SilvertronJR. I believe the 3 mA can produce the desired particle size if I get the correctly proportioned anode.
It is the cheapest unit I have come across, so far, and it seems reliable from the information I have gathered. However, I will have to do some more research before making a final decision.