Lockset for Herring Hall Marvin safe

I have a small safe (20x16x16) that another expert believes to be a box from inside another larger safe. Very nice chrome handle/bars. It is in good condition and was recently serviced. The lock itself appears to be a Hall (according to the online expert), and the dial is marked with Herring Hall Marvin, Cincinnatti. Inside there is comparment door but it is missing the lockset and key - anyone know how to replace these? Thanks, GVP