Bifwynne,
None mentioned are in production today. All can be found on this site or e/bay, either used or NOS. If you want to know of a MM that is currently being manufacture today and is as good as or better than any of the ones mentioned, then get yourself a Clearaudio Virtuoso Wood. New, around $1000. Used, less than half that. I bought my 3rd Virtuoso used with a new Sound Smith retip for $400 last month. This cartridge will take a back seat to NO one. Just amazing!