Hi Ed,
I have also lost track of this guy, I last wrote to him in 1994 but my letter was returned with a note to say he'd was no longer at that address. I did try tracking him down a few years ago but have had no success. The only contact detail I have is the out of date address which is printed in an old issue of LD+A from, I think, 1979. There is also a short article on him and his collection in that, if you don't have a copy I'd be pleased to send it over to you.
Best regards,
James.