The Defense Logistics Agency seeks potential sources for parts to support the Patriot Electric Power Plant III 400Hz air defense system. The required items are specific cable assemblies and a hybrid relay, with estimated initial production quantities provided. The Government explicitly states it does not possess the technical data packages for these parts, and they are not available for release. This is a sources-sought notice for planning and market research only and is not a solicitation. Responses are requested to demonstrate a company's capability to supply these or similar parts.