I took the photographs below at Rockform who we often use for sourcing difficult to find tiles. Tony and Mark who run the shop have been in the business for many years and have a vast wealth of knowledge so I can highly recommend them; they can be found on the (A6) Garstang Road at Brock, Near Preston.
Rockform Ltd can be found on the (A6) Garstang Road, Brock, Near Preston, Lancashire, PR3 0RD