WinForms Pivot Grid control with independent columns and rows

Question

I need to add a pivot grid to an existing WinForms application. There are a number of commercial controls that meet the general requirements but fall short with one important one. The two I have looked at so far that come close are XtraPivotGrid Suite (www.devexpress.com) and PerpetuumSoft OLAP (PerpetuumSoft.com).

Both of those controls (and others that I looked at briefly after a google search) don't support multiple independent rows and columns. That is, I can examine say sales broken out by country and then by vendor, or sales broken out by vendor and then by country, but I can't have one column that shows sales broken out by country and a second column that shows sales broken out by vendor.

I'm looking for a control (commercial is fine, open source is better) that provides general pivot functionality and additionally supports independent rows and columns.