From the wizard spire in Commonlands, head NE until to hit the wall. There is a NPC between two huts that sells the bard discs you are looking for. This was mentioned in some patch notes.
For Puretone & Deftdance, the NPC is spawned at the huts east of the Druid rings in Commonlands. Name: Bakrav Uramis http://eq.magelo.com/npc/448422 Happy Barding.