Whole Foods often sells a decent salmon chili in the seafood department (usually available at the West LA WF at Barrington & National, less consistently in BH & Westwood).
Otherwise, I'm sure I've seen salmon chili anywhere else in LA! For example, I don't think they do any fish chilis at Chili My Soul (or at least, there's no mention of same on their website). Nor at Bristol Farms, where they reliably have 3-6 different beef, pork, poultry, and/or veggie chilis every day but IIRC none that use fish. If you google <"salmon chili" "los angeles"> you get more references to Chinese or Thai dishes using salmon and chilis, which sound good but not what you're asking for, if I understand your request correctly.
Hopefully others will have better suggestions.