If your parents belonged to a synagogue, ask them. I'm quite sure that vital records were still the responsibility of the church/synagogues at that time in the province of Quebec, and that deaths were recorded by them. I imagine this would be necessary for burial. I know for a fact that births were still recorded by the synagogues at that time.
Sagan/Shagan family from Veliuona (Velon), Lithuania
Goldberg family from Vidukle, Lithuania
Susselovitch/Zuselovitch family from Raseiniai (Rassein), Lithuania