Neil,
Did you have any luck getting in touch with Roces or finding a Tanker? I contacted both Roces USA and Canada and have not gotten any reply from either place. I might be able to get you one from overseas if you want, but would have to check on the shipping cost for you if you wanted to go that route. I have the 03-04 model and have been riding it since february and it is by far the best tanker yet (my avatar is a pic on the 03/04 crown taken at the Longboard Classic in Japan).
cheers,
sandy