I'm so sorry to hear of his passing. I think about him time to time and had tried looking him up to no avail.
I met Mark on the 2008 CanAm Tour (put on by Pelicans from the PNW and Canada regional forums). I would have been 27 at the time.
Several years later on another CanAm, after he had sold his 3.2 and was driving a 997, I had the pleasure of sharing a table with him at dinner. I remember his great knowledge of under-appreciated French wines, and stories from his extensive travels, two interests that we shared. He advised me to buy nice air cooled 911s in the US and ship them to europe, then take a lengthy roadtrip vacation before selling the car in Germany where the high prices that 911s were fetching would pay for it all. He also extended me an invitation to visit his house in Whistler. Regrettably I did neither.
What struck me most about Mark was the kind and understanding manner in which he treated people from all walks of life - something uncommon among people of his level of intelligence, from my experience.
Here's a photo of Mark at one of the CanAm dinners in 2008 - he's in the black vest:
Mark's old Turbo-look 3.2 Cab in back: