Sure I can add a few to the order, just send a message once you pick them out. The thing to watch for is the shipping date. The chicks are coming from the 9/23 hatch so your chicks need to be available that date too.
As for the hatchery birds some chickens lay very very poorly so even when crossed with a great layer the result is only average laying. But some of the hatcheries do have nice birds. I have a good looking BR rooster from Meyer but not show quality. Akers claims to have heritage or pure breeds and their prices match up closer to the breeders prices. But I'm not sure if they ship and they don't give exact dates for your order since they are not as large as Meyers or Crackle. But right about now the hatchery hatching season is winding down. Meyer has the largest selection of the few I checked out. I did not look into white egg laying breeds though. I'm not against the white eggs, but having only brown eggs makes it easier to pack up a dozen eggs. No picky customer wanting 6 white and 6 brown fresh eggs.