The Department of Defense, through the Department of the Navy's NAVSUP Weapon Systems Support, is soliciting proposals for the manufacture of spare parts, specifically a collar for transport, under a sole source requirement. This procurement is critical as the government lacks sufficient data to contract with sources other than the current supplier, necessitating Government Source Approval prior to award. Interested vendors must submit the required documentation as outlined in the NAVSUP WSS Source Approval Brochure, which is available online, and proposals must remain valid for a minimum of 120 days following submission. For further inquiries, potential bidders can contact Natalie Kilkenny at natalie.a.kilkenny.civ@us.navy.mil or by telephone at 215-697-3951, with the solicitation deadline extended to August 1, 2025.