I wonder whether things have changed in L.A. I grew up in the West San Fernando Valley in the 1980s. Back then, there were very few frum Jews anywhere west of Encino. To find a decent selection of tallits for sale meant driving over the hill to the Fairfax District, which I have heard has now been supplanted by Pico-Robertson.
I have a feeling it’s still a challenge to find a good selection of tallits for sale in most parts of L.A., because today, as an online tallis seller based in Israel, we get a considerable volume of tallis sales from customers in Los Angeles.
Besides West Los Angeles, we also see a number of tallis orders from the San Fernando Valley, including Tarzana, Reseda and Valley Village, and even some from the West San Fernando Valley. From what I gather, there are now Orthodox congregations in places like Calabasas, Woodland Hills, Agoura, Thousand Oaks, etc.
We also get tallis and tzitzis orders from San Diego and Orange County (e.g. Irvine, Torrance, Santa Ana, Downey, Pasadena).
Up in NorCal we have customers from the San Francisco Bay Area (including Oakland, Berkeley, Richmond, San Jose, Sunnyvale, Palo Alto), but what puzzles me is why we get so few tallis orders from San Francisco.