Vacuum Cleaners Discussions

I have both a cxl and a dxl Tristar vacuum.. I have been looking for an original exhaust cap. The ones available are black plastic. Photos of original machines show a chrome cap which I assume is plated metal. Does anyone know a source for the chrome caps and if they are actually metal? I am not getting any answers from the sources I contacted so I thought I would post on this site. Wes