Get a new e-mail account through someone like Yahoo, Hotmail, or Google. Then apply for a new account as usual. If you’re not worried about your current character, then I’d say to just leave the stuff on them.
This is a suggestion, and a question. Would it be possible for to take the old-avatar out to a spot in the wilderness, and drop everything that might be of value, and then take the new avatar to pick it up? I know it can be picked up by others, but if one makes sure no one else is around, and kinda hides the items in a bush or something, would that work? Additionally, it may be a good idea to have both avatars in the same place before beginning this procedure.