The Defense Logistics Agency seeks sources for Original Equipment quality spare parts to sustain the Terrestrial Transmission Line-Of-Sight (TRILOS) system. The requirement is specifically for a 50-meter cable assembly and reel, and vendors must demonstrate the ability to supply parts meeting exact Form, Fit, and Function specifications with full traceability. This is a Sources Sought notice for market research only and is not a request for quotes or proposals. Responses are required to include detailed capability statements, technical documentation, lead times, and pricing models. The performance location is Aberdeen Proving Grounds, Maryland.