Well, My favorite So CA quilt shop is M&L Fabrics. There have been many posts about this quilt store on this website. It is located on the southeast corner of Ball and Knott. About 2 miles south of the Riverside freeway. Some batiks from Robert Kaufman are $5.99 a yard. Another excellent quilt store is called Quilter's Cocoon in Riverside of the 91 frwy.:
http://www.quilterscocoon.com/
So many of the better LQS have unfortunately closed these past 5 years. Quilt in a Day would be a must stop and so is Cozy Quilts. I don't drive but told all my quilting friends that a trip there is all I want for my birthday. Also one I really like was Fat Quarters that will probably be in the San Diego run. You might want to Google and see from any photos if they have the fabric you prefer.