There are few that I have been to. They all have the Filipino mods. Pure Vapor is one of the distributors of the King by Surefire, they also get Kayfuns. Ultra Vape gets some European mods like the Nemesis, but you will pay over retail. Vape Station Exclusive gets the Chi You. The
vaping section has some JM22s, they had Poldiacs as well. Poldiacs were priced over retail.
Walnut - Pure Vapor, Vapor Junkies
West Covina - Vape Station Exclusive, ActiVape, Ultra Vape
Rowland Heights - The Vaping Section
Industry - ActiVape
Diamond Bar - The Vaping Section
There are a lot of shops in SGV, try using Yelp and your phone to call them and see what they have. We are lucky there are a lot of quality shops here in SoCal.