Since 30 odd people viewed this and said nothing i thought i would, i don't think you can get J league stuff abroad, you can try www.subsidesports.com, They have J League shirts, or i suppose ebay or something
http://www.subsidesports.com/uk/sto...470&cid=661&brc=&red=product_list.jsp?id=661, They have it but it's sold out for the moment.