Hello! Do you have any parts for Rittenhouse (Emerson) All Transistor Radio-Intercom System, Model RM-1 (AM radio) or RM-2 (AM/FM radio)? Our system dates from the 1960's--still going strong. But I need knobs and especially the instruction manual because I don't know how to answer and use the exterior Door station (or for visitors to talk to me). Maybe a manual for another vintage Rittenhouse model would have useful instructions? Any help would be appreciated. Thanks, Diane Reichard in Princeton, NJ ~~ WEB LINK