i was in lowes and saw something that i thought may be useful with aeroponics (and easy to get ahold of).
this one is a "drip to small spray" system -- comes with eight heads, tubing, and the hose connector for around 20 bucks. put that inside a tuperware container, you're off to a good start!
LINK TO LOWES.COM
they also had several different types of mini water spickety spray spinner things -- from quarter/half-circle sprayers to circle/spinning-misters all for around 5 bucks for a pack of 10. all you need for these is a low-level pump (i think as little as 10gph pump) and the flexible pvc. you punch a hole in the tube and twist the piece in...thats it --
LINK TO LOWES.COM
i ended up going in this direction -- Rain Bird Shrubbery Spray Head - Full Circle Pattern -- i got a few of the threaded pvc attachments and 5 foot of tube and some elbows, "t's," etc and constructed an angled system of 4 with a 325 gph pump and am very impressed with it....
LINK TO LOWES.COM
hope this helps..
sg