I'm not sure if this will help but I grew up in a small town very close to Ste. Sabine and although we had a regional newspaper (The Sherbrooke Record), everyone read the Montreal Star (now defunct) and the Montreal Gazette and usually placed obituaries in either of these. Now, judging by your ancestor's name, I take it he was French so am not too sure about local French papers - only know of the Journal de Montreal but it may not have been around in 1928. I also found when researching obituaries for my ancestors, obituaries weren't published until the 1940's.
What you might want to do is contact the Ste. Sabine Library where they might be able to help you out athttp://ste-sabine.qc.ca/indexFr.asp?numero=34