This is a Sources Sought notice for market research to identify potential suppliers for the spares procurement of a Modification Kit for the F-15 platform (NSN: 1650-01-732-4239, Part Number: 174-98). The estimated requirement is 542 units, and performance will be at Tinker AFB, Oklahoma. Interested parties may be responsible for new manufacture, supply chain management, and nonrecurring engineering costs to become an approved source. The government is evaluating whether this effort can be competitive or set aside for small businesses, including 8(a), HUBZone, and other socio-economic categories. No solicitation is available at this time, and no budget figures were provided.