I wanted to pass on to you another place to look, and that would be the French Genealogy Society, the are in the Nativity Church next door to Father Villeneuve and apparently there records go up to 1921 on microfilm. I don't know if there is a fee for their service.
I should also have mentioned that my source for the St. Rapheal's transcription is:
Gravestones of Glengarry, by Alex Fraser.
Alex has a website at www.http//members.tripod.com/~GLENGARRY/index.html
I did a disservice to Alex and his hard work by not stating my source. Alex has a number of good references on his website and I recommend in Glengarry Research.