I wasn't familiar with the difference between English and American Labradors, so I looked it up and found this.
"Labradors bred for show and conformation have become commonly known as English type Labradors as theyíre way more common in the UK.
Labradors bred for field trials and hunting have become commonly known as American type Labradors as theyíre way more common in the USA."
I have two Akita's that we show and I'm very familiar with the Show World and believe strongly in Conformation in the breed. When we went out looking for a new puppy we started out with the Akita Groups on Facebook. Have you joined any of them for English Labrador's? We also went to quite a few AKC Shows and met the top people in our area based on who was winning Best of Breed for our breed. Since we where not finding what we where looking for locally, we started researching who the very best dogs where in the country, and also who created them. The amount of money that goes into creating top quality show dog is crazy, but the results are obvious.
It's taken us years to get to know those people and even longer to be accepted by them as a place that they would allow their puppies to live. Something that I wasn't aware of when we first got into showing dogs was how careful and cautious the top people are in who they sell their puppies to. We where inspected, researched and had to fill out multiple page questionnaires. A breeder that put in the time, money and effort to breed the best quality, best genetics and temperament will not just sell a puppy to anybody. There is usually a waiting list, and multiple people wanting that puppy to chose from.
Since you didn't mention showing the dog, but that you wanted a well bred English Labrador, some of what I said might not apply to you. In every litter, there will be the pick of the litter, which is what I'm after when buying a puppy, and then it goes down to show quality and pet quality. Prices vary drastically depending on quality and lineage. But the process should still apply. https://www.akc.org/
will have a list of shows that you can look up and go to. These will be for Confirmation and have a hundred or more breeds there. Labradors will always be very common at every dog show. There is also something called a Specialty Show that will focus on a specific breed put on by a local club for that breed. English Labrador Specialty Shows will have the top Labs in the country. In September we are having the Top 20 Akita Show in Denver. The very best Akita's from all over the country will be there along with quite a few from Europe. A male that we plan to breed to next year is coming from England and we will be getting a couple of straws from him once he's in the country. I have two of the top 20 Akita's in the country, so it's now become easy to find puppies and people wanting to breed with us. I'm sure that English Labrador's have something similar, I just haven't looked into it.https://caninechronicleshowcalendar...eed=118&opt=BRD&seq=def_breed_pr
Canine Chornicles puts out the standings every month for every breed. The link is for the top 40 Labradors currently in the country. This is the list that I would start with when looking for a puppy. They names of the owners is listed under the dogs name and who you should start researching. I don't know any of them, or anything about that breed, but the process is the same for any breed if you want quality.