Yes and no
I live in the IE and work in OC. The only place I can really think of would be Turners Outdoorsmen.
www.turners.com
They carry quite a few surefire products and accesories, I think I saw a few streamlights too.
I bought my Z2 from there and my Benelli.
The price on their firearms are a little steep (thats why I've only bought one there), but the Z2 was maybe only 5 bucks more then I saw it on a web site for. It was still cheaper then the surefire "retail" price.
I only buy my lights online now (the Z2 was the only I bought in a brick and mortar store).
I've been to the Turners in Chino, Fountain Valley and some place in the LA area.