The Department of Defense, specifically the Department of the Navy through NAVSUP Weapon Systems Support, is seeking qualified sources for the procurement of 8 units of the Power Inverter, NSN 7R-6130-011868815-ZR, with reference number 406-075-802-103. The procurement is subject to strict source approval requirements due to the flight-critical nature of the item, necessitating that only previously approved sources may submit proposals, as adequate technical data for alternative sources is not available. Interested parties must provide comprehensive documentation as outlined in the NAVSUP WSS Source Approval Information Brochures, and proposals must be submitted to Marisa L. Tetkowski at NAVSUP WSS, with contact details including phone (215) 697-2644 and email MARISA.TETKOWSKI@NAVY.MIL. The solicitation emphasizes that offers lacking the required source approval documentation will not be considered, and the timeline for source approval may affect the award process.