Try looking for it in your local library. They often have collections of classic short stories that might include 'A Rose for Emily'. Or, check out popular ebook stores, as they might have it available for digital reading.
You could search on academic websites dedicated to literature. Sometimes, universities or educational institutions make such resources accessible. Also, some dedicated short story websites might have it. Just keep looking and you'll find it.
You can find it in many literary anthologies or on some online literature platforms. Just do a quick search and you should be able to come across it.