The Government requires 8 each of a power supply modulator (NSN 7H-5865-015249866, P/N 900-30600, TDP VER 005), to be delivered to DLA Distribution, New Cumberland, PA, and DLA Distribution San Joaquin, Tracy, CA. The part must be acquired from or repaired by a source specified on source-control or selected-item drawings per DoD-STD-100, because suitable technical data, Government data rights, or manufacturing/repair knowledge are not available to allow other sources or second-source parts. The proposed contract action is intended to be sole-source under FAR 6.302-1, and award will require the offeror, product/service, or manufacturer to meet applicable qualification requirements at time of award under FAR 52.209-1. All responsible sources may identify interest and capability or submit proposals, quotations, or capability statements; this notice is not a request for competitive proposals, but responses will be considered in deciding whether to conduct a competitive procurement. The acquisition will not use FAR Part 12 commercial-item procedures, though interested parties may identify commercial-item capability to the contracting officer; standardized documents are available through DODSSP/ASSIST-Online, with patterns, drawings, and purchase descriptions not stocked at DODSSP.