I've just had a look on there and there seems to be quite a lot available around the Feckenham area, many different plot sizes.
Another alternative is to have a chat to farmers in your ideal location, you may strike lucky and fine one that is willing to sell a couple of acres at the end of a field. (I know someone who ended up with 27 acres by taking this approach!)
Fisher German, GH Banks, McCartneys, Halls, Nick Champion around Tenbury. You could always ask someone from one of these to ask around for you and negotiate. There would be a fee for you, but they might succeed where you would fail.