Had approx. two dozen of these at Prescot Extra store at 3pm today on the ground floor approx. 3rd or 4th aisle over to the right of main grocery area it seemed to be a mostly clearance area on the right hand side of aisle, about middle of shelf, failing my directions just ask staff!
Tesco Customer services freephone 0800 505555 to do a store stock check but they are not always accurate with the info but they can give u individual store numbers.
£15 on JML site
This info from old Tesco page not available online