My 2 newf/pyr mixes Sam and Max were accidents and to be honest I really hope that no one is mixing these breeds on purpose. That being said, I've seen newf/pyr mixes on both the Petfinder and Puppyfind web sites. I'm not sure where you,ve seen the mix before so I'm not sure of what you're looking for. Since they're a mix they don't all look the same. Some, like mine, favor the Pyr side and others I've seen look more Newf like. Fortunately both breeds have great temperments so you shouldn't have a lot of problems in that area no matter which side the pup favors. Good luck with your search. I'd love to see pictures if you find a pup.