You can purchase a flag and request for it to be flown over the U.S. Capitol Building. "All flags flown over the Capitol will include a certificate through which you can recognize specific individuals or organizations." You have the option of choosing the flag to be flown over the Capitol and may choose its size.
For further information contact your Congressman; they have price lists and order forms.
"Flag Requests." Congressman Ed Pastor. http://www.pastor.house.gov/index.php?option=com_content&view=article&id=54&Itemid=62 (accessed November 9, 2011).