That setup was about $340. Give them a call and they'll set you up. Tell them how much you want to pay, and they will make a kit to fit it. They're really friendly! The tanks aren't really expensive, it's mostly the horns and pump. But for the pump, I would ONLY get a Viair! They have tons of different Viair pumps! Good luck!

 

This is the one i settled on. They are on back order right now but hopefully not for much longer.
The set is under $500 shipped. 5 gal tank, 200 psi switch, viar 380 and ridiculous sound.
What it comes down to is you have to pay to play.
http://hosting.kyozou.com/siege/vid/anvil.mpg

http://www.siege-engineering.com/Default.aspx?pid=4956