wilobrook farms - check out BYC auctions - silkies are offered frequently - I saw one person that said they would provide a free rooster with the purchase of their pullet, IF the buyer wanted him.
Some of the sales are "buy now" at a stated price and the first person to pay it - takes it. In the auction type the highest bidder wins and prices can go high quickly. There are very nice bq and sq offered, wish I could have them myself.
Also its a way to find silky person that have something to sell. Even if you don't want what is offered, you could ask if they have other stock, etc. I don't really know silky people except for Sundown, and she sent a beautiful buff pullet that she considered pq. - her show stock looks amazing.