But hatchery stock is bred for laying eggs and has lost a lot of the DP body type that breeder stock still has. That's why it's better to get stock from breeders who breed for the chickens true purpose.
Sandhill preservation has both types I believe and they are breeder stock not hatchery
http://www.sandhillpreservation.com/catalog/chickens.html
Whitmore farm also has Delawares but not Rocks
http://www.whitmorefarm.com/store/212
If you can hatch eggs there are quite a few people on BYC...