I love them too and hope that one is in our future. Currently we have a rescue that was supposedly a Lab mix, but as the past two years have gone by I am pretty sure that she is anything but Lab. She isn't food motivated, doesn't give a darn about tennis balls, and is so low energy that jumping up on the sofa is just too much effort. But she is the best dog that we have ever owned.
She was 6ish when we adopted her and we are at least her third family

but she came to us potty trained, able to use the dog door, doesn't bark except at the dog park, doesn't counter surf, gets along with everyone - human, canine, and feline. She comes when called, and stays when told. She doesn't even pull when on leash. She used to not beg at the dinner table but someone (I'm looking at you, dear husband) has ruined that. She wags her tail whenever one of us comes into her field of vision. She is simply amazing. She was trimmed up when we got her but now has long fur and looks like a miniature Newfoundland. (She's about 65 lbs, so not a newfie!)
I know that we have a few doodles at the dog park, and a couple of them are rescues, so you can always go that route in addition to looking for a breeder.