Trying to find a half golden half lab

I can’t help either but my SIL is blind with Seeing Eye dogs.Her current dog is 3/4 Lab,1/4 Golden Retriever.He’s solid black,hair is a little longer than pure bred Lab.He’s 9,she’s had him 7 years.
Her previous dog was 1/2Lab,1/2 Golden ,female.Looked exactly like a yellow Lab,hair length and all.Had her 7-8 years.

Prior to that she had 3 pure Labs,they didn’t last very long at all.1 went blind,one had anxiety issues and was destroying her furniture,other one had health issues.She did have a pure Lab prior to those 3 that lasted a good many years.

Seems to me they are doing better with Lab/Golden crosses.Hybrid vigor I guess.

All Seeing Eye dogs are very chill dogs with great temperaments,super obedient.They don’t put them out leading the blind if they weren’t.

It’s possible sometimes to adopt a retired dog but you have to go to New Jersey to be interviewed with no guarantees they’ll choose you.

Interesting side story-one of her friends had a dog that developed vision problems,a veterinary opthamologist fitted him with glasses,goggles actually.I would love to know how they determine prescription lenses for a dog.