The German DWD NWP SURFA fields are available starting Jan 2008. Data within the past year are online and data older than a year are archived to tapes.
http://www.ncdc.noaa.gov/oa/rsad/air-sea/dwd.html
Downloaded Thursday, 01-Aug-2013 11:35:39 EDT
Last Updated Tuesday, 13-Dec-2011 11:41:51 EST
Please see the NCDC Contact Page if you have questions or comments.