Hi IllusiveTrout,
I live in the Los Angeles area. When I have seen Cues for three cushion being sold here it is usually by individuals and not a particular store. In the past I have seen Adam, Longoni, Tiger, VillaSenor, and Higher end Hanbat cues sold by individuals. The only name I remember is Hector Rosales ( not sure if I spelled his name correctly).
Last time I was in College Billiards in San Diego they were carrying a cue brand from Mexico called "Hakamori". The name sounds Asian but it comes from Mexico.
Others have mentioned the Tiger cue Factory which would be a really cool place to visit, . I have a Tiger shaft fitted for my Longoni cue and I like the shaft, If I did not already own a Longoni cue I would probably own a Tiger Carom cue. I wish there was a brick and mortar store here that sold Carom cues.
Dean