there is one product that you could buy, it is an embedded pc made be eurotech.com, it has a addon card that you can buy for the second vga or dvi modules. also has an lvds output so you could have 3 screens running of the one board, i suggest buying a development kit from them as you will get everthing you need.
http://www.eurotech.com/en/products/...+boards/APOLLO
hope that helps you out mate