I have a 3 year old chocolate lab that I would like to use for breeding . He is getting very frustrated and castration I think is cruel but will be a last resort to rid him of his frustration. I live in the Teesside area. Where can I find a b*tch for him to breed with? Im not in this for financial gain nor do I want another puppy, I just want my dog to be happy and not sexually frustrated.

Dogs don't get "sexually frustrated". They have a biological urge to breed and perpetuate their species. Do your dog and yourself a favor and have him nutered. He will be healthier and a better pet without having to think about breeding, and you won't have to be on the lookout to get your dog laid.

Male dogs do not get sexually excited unless they are in the presence of a female in heat. It sounds like you're uneducated about dogs so you're the one who is frustrated. Get your dog neutered. It IS NOT cruel. Not having him neutered increases the chances of testicular cancer and prostate cancer. THAT is cruel.