I had the same problem and found that commercial misters were a bit too powerful.......
No pictures I'm afraid as I had to dismantle it recently due to a reshuffle, but I'll try to explain.
I have one set up for a stack of 4 vivs...
I use a length of hosepipe which is fixed to the outside of the stack down one side. To this I attached thinner lengths of tubing (from any garden centre, designed for plant watering - connectors and spray heads included) which poke through a hole in the side of each viv and are attached to the roof of the viv with cable clips. at the end of each piece of tubing is a (suppied) spray nozzle which is angled to mist as wide an area as possible.
The top of the hosepipe is blanked off by folding it back on itself and secured with insulation (electrical) tape.
The whole thing is powered by a caravan (RV) water pump attached to the other end of the hosepipe. the pump sits in a bucket of water next to the vivs. Have a look at this for the type of pump I use..
http://www.gocaravanning.com/shopping/caravan-water-pumps.htm
I use a variable voltage transformer and so the amount of water that is pumped in can be controlled by changing the amount of power to the pump (read manufacturers instructions for the min and max recommended voltage)
The power is rigged to a timer and sprays twice a day.
I couldn't find the exact plant misting system I use but follow the link below as it may give you some ideas.
Hope this helps!
Link