Additionally, you could check Craigslist's homes for rent section or the Riverside Press-Enterprise on line at pe.com.
Hope this helps.
I'm not sure what you consider affordable, but if you're still looking I encourage you to check out the homes and condos currently listed for rent on Trulia at the link below. You can use the filters on the left side of the page to refine the list of results by your ideal price and other criteria as well.
Best of luck with your search.