Most people I know who breed border collies will happily place a puppy in the RIGHT non working home. There are some "working homes" that would never get a puppy from these folks. It all hinges on the best situation for the puppy. If there's a list, it's likely full of "working" people because they know in advance of the planned breeding, they'll get priority, but the purpose is not necessarily to refuse non-working homes.
Never heard of any of them requiring a pediatric spay / neuter. I'm not saying that doesn't happen, but I've never heard of it. Most know that's not good for dogs.
I would not be a fan of a "reputable breeders list." I guess that would mean that whoever is not on it is disreputable. If somebody is aware enough to be looking for such a list, I trust that they're aware enough to do their own homework and research. Since we have the Internet, and here we all are on it, everybody can network and share information, as well as communicate directly with anyone breeding and their clients. As Donald says, a great many of our dogs don't come from people who identify themselves as "breeders," but from individuals who have a really good dog that they think would cross well with this other really good dog.