This might be what you want. Page 37, the Netafim vibro-net misters. Most likely would hang them from 1/2 tubing. You will also need a punch tool to make the hole in the tubing to snap the dripper assembly into it. You would have to hang at least three runs of tubing on 5 foot centers to get 20' of coverage width, as the largest diameter of coverage is 4-6'. If you wanted to guarantee full coverage, you would do for lines on 5' centers.
You would hang a mister assembly every 3 feet along each line.
https://www.rainfloirrigation.com/wp...ages-37-38.pdf
Netafim also has true fogger:
http://www.netafimusa.com/greenhouse...ation/foggers/ This link has layout and specs for spacing etc.
Video of vibro-net mister:
https://www.youtube.com/watch?v=as_V0X7j-KE
Video of coolnet fogger:
https://www.youtube.com/watch?v=PQOPuBsSwfw