I'll say it before somebody else does $50 PSU for an SLI board!!??? Save up some more money, no matter how long it takes so you can get a decent PSU like the
SilverStone SST-ST52F which also comes with dual power connectors for your video cards.
If you don't want to spend the bucks, then just go to Newegg, select all PSUs and sort by price and see what you can get for $50.