To amplify--
Many of Folkways' recordings have been re-mastered (particlarly the Lomax material) and are being sold under the Rounder label (although Bear Family has issued a few, also.)
   THe ones that haven't been re-mastered are sold as custom CDs or cassettes by S-F.
   CAMSCO carries all the re-mastered ones; you can also get them directly from S-F (at a significantly higher price.) Custom copies are best obtained directly from S-F.