With mary's clue, I found an email address which he posted in 2004:

ianfbenzie@fireflyuk.net

at the time, he said he was in "Clare's" in Switzerland. I guess that means Clare D. Harper, his partner?

I couldn't find any more recent posting than that of 2004, but it may just be the search function not working completely well and/or my not giving it the right search parameters.

Hope the email works, then.:-)