You can sometimes get copies through secondhand dealers, but The Foggy Dew in particular seems hard to find.  However,  The South Riding Folk Network  is currently discussing with EFDSS a joint project which, if all goes well, will re-issue the books in ring-bound A5 format, starting with The Wanton Seed.  EFDSS' solicitors have now established the precise copyright status of the material (including Frank Purslow's notes and editorial contributions) and, subject to an agreement all parties are happy with, I'm hoping to be able to get to work on it soon.

Malcolm