is there such a thing as a triple VGA out put Graphics Card?
Why do you want a card with triple vga outputs?
As said earler, the radeon 58xx cards can attach three outputs, the catch being one of them needs an active displayport monitor or a powered displayport to dvi adapter(about$100)
If you just want to attach three monitors, I suggest adding a second cheap graphics card(about $30). Attach your gaming monitor to the strong card, and the side monitors to the cheap card.