.xlsx and openpyxl

I have been working with excel files (.xls), using xlrd and xlwt for a long time and, indeed, they have saved me. Recently I am using pretty long spreadsheets which are not supported by Excel 2003. Excel2007 and 2010 do support them, but xlrd/xlwt don't. Using xlsxwriter makes it possible to write .xlsx files, but they cannot be read by xlrd. Instead, .xlsx saved manually by me can be read by xlrd..

Tried to install openpyxl for IronPython, but did not manage. Additionally, I have read that openpyxl is not compatible with IronPython. Did anybody manage to make it work?

Any guidance on how to use Excel functionality in .NET called from IronPython? Or maybe, any other alternatives to work with .xlsx (read/write)?