This is a Sources Sought notice for market research to identify potential manufacturers or suppliers of a specific Circuit Card Assembly for the Patriot weapon system. The notice explicitly states there is no solicitation available at this time and this is not a request for proposals. The acquisition is currently being procured as a sole source under specific regulations, requiring the part to be acquired directly from the approved manufacturer, though the government is seeking to identify all qualified sources, including small businesses. To be eligible, a firm must be able to meet stringent prequalification requirements, including engineering source approval from the designated government authority, and must have an active US/Canada Joint Certification Program certification to handle export-controlled data.