Hi There, In the absence of a reply. A couple of suggestions if I may? It is very unlikely you will find just that part, unless someone has a complete downlead assy for sale for one they may have changed to another Mic type or connector etc. They hold their price though, so may I suggest you contact Bose and ask for it to be taken back for repair? Not sure which Country you are in and if that is possible, but here in the UK, there are several Agents for Bose that will carry out that type of repair to avoid the cost of a new Downlead.