The Defense Logistics Agency is seeking qualified sources for new upgrade hardware, software, and production spares for Kuwait’s PATRIOT Phased Array Tracking Radar program, with performance in Redstone Arsenal, Alabama. This requirement will be placed on an existing subsumable contract, and the government currently intends to award to Raytheon under sole-source authority. All interested businesses, including small and disadvantaged firms, are encouraged to identify themselves and must meet prequalification requirements to be considered. Contractors must be capable of handling all logistics, engineering, and procurement responsibilities associated with becoming a qualified source. No budget amount or submission timeline is specified in this sources sought notice.