Thanks for checking the probate index. I'm not surprised they're not there, as I strongly suspect they were quite poor.
I was mainly interested in cause of death, as they both died when they were relatively young (33, 34), but I was also hoping to find further confirmation around their family relationships (i.e., name of spouse, children). Ordering through Ancestry.com, and including shipping to Canada, each certificate costs CAD$47, which is expensive for a single document.