Yep, registration and pedigrees are the coup de grace for dog breeds. It's great that the US has the geography and culture that can lead to the development of great hunting dogs. If I was looking for a hunting dog I wouldn't look outside the US. You just have to know where to go. Which is why it's surprising to me that you're looking at the airdales.
Pssst....my Labs are imported . Why ? Because the Irish know how to put together a Lab. My future Airedales ? From Germany.