Sorry Gill I dont know of any organisation so I cant help. I'm a little surprised about the rescue centres that the owner contacted not taking this dog, I would have thought those with behavioural problems would constitute a high percentage of those needing to be rehomed :?
This dog needs to go to a home with experienced dog owners, who have dealt previously with dogs with behavioural problems - I guess not the easiest type of owners to find :? I'm wondering if it's worth following up with cocker rescue as you say they might not have been contacted yet, and also emailing our member Hel who as you know, sometimes fosters cockers and may have some good advice for you. You probably will have to take him in for a while... who knows, remember Vegas' nickname was 666, and look how nice he's turned out, it's possible this dog will thrive in your home? Good luck, and let us know how you get on!