Some sponsors have are no longer here because they do most of their sales on Facebook or sell locally. Others have left because the quality of the fish turned from excellent to bad, the buyers posted reviews with pic and we dumped them. Once the fish from a certain supplier were of superb quality but carried a devastating disease. This affected me once and another member. I won't go into it but it was devastating. We told the story here and they were promptly dumped. If you get bad fish from a sponsor you should document it in the reviews section. Otherwise nobody knows about it and you stew in your own disappointment.
I didn't want to suggest a sponsor because it would seem like I was playing favorites. In your case I would suggest Kenny. He has been a sponsor for many many years. The quality of his fish has always been good. The fish have unfailingly been clean.
Since you are very wary, which I understand, and you live in CA I would suggest Kenny. Dennis has also had great reviews but Kenny has a long record of integrity. And that's all I have to say about that.