PNY Quadro Pro series
http://www.superwarehouse.com/PNY_Qu...VS-PB/p/402502
Try that.

Supports up to 4 VGA connections.
If you want to get crazier, install it as a 2nd video card (if your motherboard will support it), plugin 2 monitors to your current video card, then 4 more to the PNY card. (Total of 6)
Oh, yeah, be sure to use "UltraMon" to stretch your taskbar across all 6 monitors.
