An update...
I have emailed several places I found in the Alberta Genealogical site. I have a photo of the gravesite, in Calmar, Alberta, and dates from Metro and Alexandra's stone now and I will continue to try to find their obituaries, or other information, to confirm they are the ones I am searching for.
Besides that, info was found for a Metro at Manitoba Vital Statistics, I have found an Anna, which might be his wife. The area, RM of Minto, seems to be correct, covering Minnedosa. Then I found a Metro and Anna, and children (none named Metro though), on a Passenger List. They arrived in 1903 in Halifax, NS. This couple could be my Metro's grandparents. I am not sure but it seems possible.