All the tunes I mentioned are available on record, as mentioned. Calennig (or Mick Tems alone) recorded Ty Coch Caerdydd.
Mick's and Calennig's recordings include many Welsh dance tunes.

(Mick suffered a severe stroke a couple of years ago, and although I am informed that he has improved and can get about now, I am not sure that he has been able to return to music.)