Hi, San Bernardino County is the largest county in the contiguous U.S. and contains MANY towns and cities. There is a volunteer for the San Bernardino city paper at http://freepages.genealogy.rootsweb.ancestry.com/~obitl/volca.htmlhttp://freepages.genealogy.rootsweb.ancestry.com/~obitl/volca.html . Scroll down to San Bernardino Co. and choose Christine.
If she can't find it, contact the San Bernardino County/Recorder's office, sbcounty.gov/acr/ and request an informational copy of his death certificate. It will list the city where he died which will be a big clue in finding his obituary.
After you find the city, then post your query again and I can provide you additional resources. Successful Searching!