The Air Force is seeking sources for spares procurement of a relay assembly (NSN 5945-01-607-7229HY, P/N L5503047-001) for the B-1 platform, with an estimated requirement of 9 units. This is a sources sought notice for market research only, not a solicitation, and no contract will be awarded based on this notice. Interested parties must register as interested vendors to participate; there is no solicitation available at this time. Performance would be at Tinker AFB, Oklahoma. The government welcomes all business types, including small and disadvantaged businesses, may consider breaking out the requirement by airframe, and the relevant NAICS size standard is 1,250 employees.