Hi,
I hope you have had some luck with your searches.
I found the two "Driver" references from the OGS transcripts at the Toronto Reference Library. Most of the transcripts there are current as of the mid 1980s - so earlier than you were hoping. I looked in the indexes of the Trafalgar Township transcripts in the Toronto library Halton County collection - no Drivers. (I believe Trafalgar Twp is where Oakville is located)
However, the Oakville library may have more recent versions of the transcripts. I would suggest that you contact the OGS (I am sure there is a link somewhere on this thread) and see how recent their transcripts are. Either of these sources may have more up to date cemetery records.
Here are the two that you located and wondered about:
Laurel Hill, Bolton, Albion (current to 1986)
Peter Mitchell Dec 27 1863 - Sept 11 1946 and his wife Maggie DRIVER Jan 8 1873-June 27 1944.
Brampton Public
Lawrence DRIVER 1920-1979, beloved husband of Joyce Miller (no dates - so she was likely alive as of 1986)
RK
P.S. Have you tried this site:
http://www.trafalgartownshiphistory.ca/trafalgartwp.html