This is a sources sought market survey to identify potential suppliers for the repair of seven specific modules that comprise the MD-1386/A Improved Data Modem Model IDM-401. The government does not possess detailed technical data for the maintenance of these modules. Capable suppliers must submit a written response to the specified commander at Aberdeen Proving Ground, Maryland, including documentation of any relevant subcontracting history. The successful supplier may be required to warrant the performance of the repaired modules.