Have you looked on Project horses? It's a website that initially was used for people to try to find experienced homes for horses with 'issues' but recently it's become a more general site and often there is something very small wrong with the horse but the owner cannot cope with it (for example one horse on there has a pollen allergy..otherwise a perfect horse but because of where the owner lives it's a nightmare..move it to the coast and I'll bet it will be fine ). It's well worth trawling through the ads and keeping an eye on the site, I know a number of people who have rehomed wonderful horses through it.

Project Horses 15hh to 16hh