The Department of Defense, through the NAVSUP Weapon Systems Support office, is soliciting proposals for a sole source procurement of spare parts under the title "15--COWLING." This requirement is specifically for airframe structural components, classified under NAICS code 336413, and necessitates Government Source Approval prior to award, as the Government lacks sufficient data to contract with sources other than the current supplier. Interested vendors must submit the required documentation as outlined in the NAVSUP WSS Source Approval Brochure, which is available online. For further inquiries, potential bidders can contact Anna M. Kiessling at 215-697-3752 or via email at ANNA.M.KIESSLING.CIV@US.NAVY.MIL.