This is a Sources Sought notice for the spares procurement of an Interface Unit (NSN: 5895015899678EK, P/N: 544R727G01) for the B1B aircraft, with an estimated requirement of 8 units. The government is conducting market research to identify potential sources and determine if the effort can be competitive or set aside for small businesses. Performance of services will be at Tinker AFB, Oklahoma. No solicitation is currently available, and no funding is allocated for this market research. The notice does not specify a budget amount or any non-bid timelines.