I've been able to find this out in Monterey Park (99 Ranch Market, etc), and also down in Artesia. But I'd love to save the 2-3 hour round trip, if there are markets on the Westside that carry this.
If you also happen to have suggestions as to different brands, that also would be appreciated. (I've been using the Au Lac version, which has been fine. But, since I don't eat fish/fish products, I obviously can't compare it to the real thing.)