I have been searching through my records and have found the address of the Archives that hold the Quaker Records for the County of Lennox and Addington:-
Lennox and Addington Museum and Archives, 97 Thomas Street East, Postal Bag 1000, Napanee, Ontario, K7R 3S9Telephone:-(613) 354-3027
My last contact was in 2002, with the Archivist Jennifer Bunting M.A. but she may have moved on since then. She was very helpful and sent me transcripts of letters written by members of the family I was researching, but they are very strict about copyright.
Good luck with your researches, and if you find any link between your ancestors and any Quakers from Somerset, Bristol, or Gloucestershire please let me know, I may have more information about them.