For starters, I'd buy something along the lines as one of these
http://www.drsfostersmith.com/Produc...&N=2004+113766
The one I had I got at Walmart and it was made of green netting, like a fish net, only shaped like a box. I had to manually transfer the fry from the tank to that though. The good thing about this one is the fry drop down to the bottom away from the mother.
That and some food for baby fry and that should be all you'd need. I feed mine in their little "nursery" until they were big enough to be released in the main tank with the others.