http://report.saltcpa.com/2013/07/washington-purchases-made-with-funds-provided-by-the-federal-government/?utm_source=feedly#.UfmUHG2DuQI
Interesting, but the article mentions the Red Cross as an "instrumentality" of the US government. Not sure that's correct. See this page from the Red Cross web site.
http://www.redcross.org/about-us/history/federal-charter