IF you're still looking for this obit, I'd contact the following:
Riverside County Library System, http://rivlib.info/website/ask-a-librarian-693
Genealogical Society of Riverside County, www.gsor.org/research.html
Riverside County is very large with many towns and counties. You might have to order a copy of his death certificate to find out where he was living before he died. Successful Searching!