When you say a "theme like this" what do you mean? It is not a wordpress theme. You could use any 3 column theme and tweak the css. I only hope you wold do a better job of the layout as that right side looks horrible - no flow at all.
There are lot of new design css templates available in wordpress, most of them are free , just download it and make changes according to your website contents. but your design was not perfect as tbunch said.