Not my field Other Succulents, but I did meet John once at a convention.
See:-
http://forum.bcss.org.uk/viewtopic.php?f=1&t=166537
John Lavranos
Re: John Lavranos
Sad year for the succulent world already!
See my current wanted lists here: http://www.u.arizona.edu/~mdpillet/cr.html and http://www.u.arizona.edu/~mdpillet/en.html.