Agreed on the Yamamoto Senkos. If they weren't really, really great, prices would have dropped over the years as competitors showed up. He gets premium prices because he can demand them.
I'll tell you one local source here in the Metroplex who makes a great 6" stick bait, other plastics too, that are very high quality. It is: KC Injection Baits
And, he can do just about any possible color combination. If you will check out his page, you will see stick baits with colored tails, that sort of thing.
No business association; I'm just a customer. He posts here on occasion showing his stuff. That is how I found him.