IPUMS NHGIS provides all tables from the 2005-2009 5-year ACS summary file, including tables on employment status and unemployment for counties and census tracts.
One reason you might not have found this information is if, within the NHGIS Data Finder, you selected a year filter for a single year (e.g., 2009) instead of the relevant 5-year period (2005-2009).
(NHGIS doesn't list 5-year data tables when a single year is selected because we found that people were selecting 5-year data very often in cases where 2010 or 2020 decennial census data were available, and they were selecting 5-year data ending in decennial years--e.g., 2020--much more often than other more recent 5-year periods that span the same decennial years. We wanted to ensure that if people selected the year 2010 or 2020, they would more easily find the census data, and we didn't want people to mistake 5-year data for single-year data.)
Note that the census tracts in 2005-2009 5-year ACS data mainly correspond with 2000 census tracts and not the 2010 census tracts used in 2010-2019 ACS data. That said, as explained here, in 19 counties, the 2009 tracts "are either those submitted to the Census Bureau for the 2010 Census, or a preliminary version of 2010 Census definitions."