Do you have the parents name of Adolphe who married Mary Gore? If not I might be able to find it tru vitals records of Ontario but it will take a few months. I don't think that the church records for Wallaceburg are available on microfilm.
Also can you tell me how you are related to Calixte and Stella?
I think that your ancestor is probably Séraphin son of Gilles and Marie Archambault. I am from Michel, Séraphin brother.