If he were closer to us (we're in Hampshire), we'd take him, and break him as a driving pony when he was older, and run him on with our other colts until then - we have about 20 of them! Sadly, it's just too far for us to come.
Have you tried putting him on the shetland sites?
Alternately, you might find that Equine Market Watch might take him, they often have homes waiting for shetlands, and they retain ownership & just loan them out: http://www.webz.org.uk/emwnew/index.php
If I can help more, let me know.
