If you already have a video card, just slap in any old 2d card. Can't use 3d with second display anyway, but you can use 2d windowed apps on it, and extend your desktop to it. If you don't have an old card lying around, most small computer stores would gladly sell you an old pull they have lying around. You should be able to get an S3 Virge type of card for about $15.