Have you checked out the Newfoundland Club of America's breeder's list? It's on their website, which is sometimes hard to navigate. I think that's your best bet since so many dog shows have been canceled.
I have been asking other owners and reading reviews. I’ve been checking out living conditions and how often they breed. Not looking for cheap. I know the average price. I have gone on their website and unfortunately the one breeder I recognize also has three bad reviews about pups on the web.