@Senior Sea Kayaker, you've probably done tons of research but I'm very interested in tourtière!
Montréal Spice Company Épices de Cru publish this tourtière recipe from the de Vienne Family.
There's also this tourtière recipe from pbs.org, this tourtière recipe from King Arthur flour, this tourtière recipe from New York Times, and this tourtière from Saveur.
Looking forward to hearing about your adventure.
Edited to add: I omitted @Ann_T's Tourtière