Check my edit above...I linked to a very capable card for $50 which is dual head PCI, one is DVI the other VGA. Hell for the price, buy two and use one DVI from each =)
Disregard, go to
www.Microcenter.com and look for Video cards on the right navigation pane. Then PCI vid card (BTW, PCI Express cards are NOT compatible with PCI slots).
There's a few there that will do the trick for you.