If you forgo the term 'certified noble' you can buy kava at Boutique Samoa in Anaheim. Not quite LA though. There used to be a Boutique Samoa in Long Beach, but I don't think it's open anymore. There's also a Samoan owned liquor store in North Long Beach that sometimes has Samoan kava in stock, it was called M&J Liquor but now might be called Sekuini Jr. Islanders. There are other little island stores around if you search, though they don't all stay in business...it's worth a shot seeking them out and calling to ask about kava. Even if the store doesn't sell it, they probably know a friend/family member that will, if you ask.
You can also find local Tongans, there are Tongan churches around Inglewood/Carson..., Anaheim/Stanton area and sometimes there are Tongan kava clubs (Kalapu) around...they will usually sell you kava, but you have to do some work to make these connections.
