XV Oil fill tube - NLA

I don't know what kind of facilites you have available down under, but you could probably get a machine shop to make something like that pretty dang easy. It's just and NPT thread on the end of a tube with a bung welded to it and capped (in it's simplest form at least). If you wanted it to look nicer you could have it made from a thick wall aluminum pipe. Thread the inside on one end and turn the other side down and thread the outside.