To get the layout I'm looking for, I (think that I) need to get a div to surround two of the three widgets that I am placing in a widget area. Is there a way to do this without making a new sort of widget?

For those of you who are fans of XY problems, let me state the underlying layout goal. The overall widget area is to consist of two columns. One column contains widget 1, the other column is to contain widget 2 followed by 3. Simply floating one left and the others right doesn't do what I want if the left content is not taller than 'widget 1'.