Its
www.supairball.com and on the homepage there is a link that says "fields on sale at the super 7". They always sell their fields at the ends of tournaments for a super good deal, it even has the prices for them on that link. Only thing is that you have to take them down at the end of the event and haul them off, if you decide to do that you should bring a leaf blower that has a vacuum option to make a whole lot easier on ya.
Blake