If anyone is interested, 7dayshop is clearing the last of their process paid Sensia 200 @ £4.89 a roll. It's dated March 2011 but has apparently been properly stored.
http://www.7dayshop.com/catalog/product_info.php?products_id=110987
http://www.7dayshop.com/catalog/product_info.php?products_id=110987