Rescue organisations with rabbits

Hi one of our rabbits died which left her partner alone and he’s getting upset. Can anyone tell me a refugee where I can find and adopt female rabbit that’s a few years old? I don’t want to buy another if I can rescue one and also rather have one similar age to him. He’s been neutered so we never had babies a friend took him for a while but decide two rabbits was too much work which is a shame because he’s the most lovely rabbit