Here is an address I found
4319 Lloydtown-Aurora Road Pottageville Ont [find out the postal code or Canada Post won't deliver it.
It is a heritage building and says he owns it but doesn't say he lives there.
Write to King Heritage Committee, 2075 King Road, King City Ontario L7B1A1
Phone: 905 833 5321.
They will know where he lives and probably be able to help you out.
There is an H Spence-Sales listed in Aurora Ont which is in the same area as Pottageville.
Also I googled him and a few articles came up.
On his father, Harold's obituary of 2004, he is listed as being at Ryerson University in Toronto. Perhaps they may know he whereabouts.
He had one sister listed on the obit as Marika Ricciardelli of Florence Italy.