I’ve pieced together a nearly complete Stemar-M set, including lens, hood, prism, finder, hood, case, viewer, manuals, boxes, and more... it’s wonderful falling in love with Leica and stereophotography all over again, and I am missing only the metal rear lens cap (OIVHO) for the Stemar-M (bayonet mount) lens. If anyone is aware of a potential source for this rear lens cap (which is approximately twice the thickness of a standard M lens rear cap to accommodate the divider at the rear of the lens), I would really appreciate your help finishing this amazing set!
Many thanks in advance for your time.