My local Churchdown co-op has box's of 16 Ferrero Rocher. There was a pile of them this morning (Sun 7th March).
This seems to be best price out at the moment!
Great timing for mothers day!
Seems to be local only, sorry, but for anyone in Gloucestershire area, here is the store's location '38-70 St Johns Ave, Churchdown, Gloucestershire GL3 2'