Scatter chart with lines between the points

In one of our Deski reports, we have a "funnel" chart.  This is essentially achieved with a scatter plot graph with lines drawn between the scatter points to resemble a line chart.  This allows us to draw odd lines, such as a funnels that don't really look like funnels.  :)  (Picture drawing a concentric circle for another visualization of what we are trying to accomplish).  So our problem is that we need to convert this Deski Report to Webi in order to move to BusinessObjects 4.1.  But we cannot seem to achieve this in Webi because the scatter plot in Webi does not draw lines between the points.  Any ideas out there?