One year old Halfords Roof Box 360L silver, selling as it has never been used, comes with both keys.
Product details:
http://www.halfords.com/webapp/wcs/stores/servlet/product_storeId_10001_catalogId_10151_productId_709091_categoryId_165500_langId_-1?cm_sp=Intelligent_Offer-_-Product_List_Zone_1-_-Blank&iozone=PLPz1