I think you may find there are more cockerpoos around than proper cockers. I know someone who was registered with every rescue, and suddenly last week was asked by Doodle Rescue if she would have a cockerpoo, very spaniel looking apart from the curls. He’s two and was kept in a basement flat, shut in a crate for 10 hours a day . I’m sure the breeder would have been mortified if they knew that their pricey puppy went to a home like this. Luckily he’s absolutely fine.
Another person I know, recently acquired very young St Bernard from Dogs Trust, with a minor health issue. No-one else wanted him for three months.
If you want a cocker, just keep trying and nagging the kennels. Keep your name on everyone ‘s list . Good luck!