Go to Kennel Club for a list of Cocker breed clubs. If you phone round the Clubs, they should be able to let you know. They should also be able to give you contacts for Cocker Rescue.
There is a full list of Cocker Breed Clubs & contact details for all Cocker Rescue Representatives on The Cocker Spaniel Club website at http://www.thecockerspanielclub.co.uk
I herd on dogpages theres a lovely rescued cocker age 2 or 3 yrs old cant quite rember , she was thrown out of a puppy farm as she had two litters that were still born , try there :)