With all due respect ,hatcheries sell silkies but, they tend to be far removed from the type of silkie you can get from a reputable breeder. There are several silkie threads on BYC - mainly divided by color. The oldest one is my favorite go- to site - Just put "Silkie thread," in the search box and you'll probably find connections there. You could also post on the California thread at "where am I, where are you." in the social forum. Silkies in this country are bantam sized. In other countries I believe they just have the large fowl ones.
Good luck with your search. They are well worth the effort in finding them. One important thing to know is, silkies are nearly impossible to sex before 4-5 mos. of age, sometimes not till they crow or lay eggs. If people offer you very young chicks and say they are DEFINITE "Pullets" or "Cockerels," I would FIND ANOTHER SELLER.