Yep, I've encountered this problem before also. I live in both NZ and Japan where dive gear is rather expensive. I often buy from scubastore.com, they used to ship Suunto to NZ, the sopped a few years ago. They used to ship to Japan up until I made an order last September when they stopped. Fortunately I have an uncle in the UK so ordered and had it shipped to him and he then forwarding to me. I don't suppose you know any one in the UK who can do this for you?
Once you add the various shipping costs I don't think it makes sense. Anyway, as you can see in my post just above found a local shop which will sell the watch for US$480.