try http://www.ee.surrey.ac.uk/Contrib/manx/history/socs/rechab.htm which is my main rechabite page - very interested if anyone can add to info there
later work post 1860 has been done by Alan Franklin of Manx Museum and I would expect a paper to come out of it (membership records post this date are avaiable at Manx Museum but dont give much info - needs considerable time to search)