If you're running for an office held by a Republican, try to get the supporter list of the last Democrat who ran for that seat. Other previous campaigns for city, county or congressional office can be cobbled together to cover a larger district (especially the parts that have strong Democratic preference).
The Department of Defense Activity Address Code (DoDAAC) is a six position code that uniquely identifies a Department of Defense unit, activity, or organization that has the authority to requisition, contract for, receive, have custody of, issue, or ship DoD assets, or fund/pay bills for materials and/or services.
On 24 February 2012, the Under Secretary of Defense for Intelligence published the publicly available DoDM 5200.01, a four-volume manual consolidating all marking of information used by the U.S. Department of Defense. There is a lot more information on the marking, access, and protection of For Official Use Only information. Most of the information is in the fourth volume, but the second volume also contains guidelines on FOUO information.