Hi Roy.
Thanks for the link to amazon.co.uk. I tried to buy it (only £15), but they do not deliver to my address in Denmark.
I found it on eBay at a cost of £27 incl. shipping to Denmark, so I placed an order.
Thanks again.
Jon
The sockets have arrived.
They look good and fit perfectly.
Need to find a, not too thick, washer so the nut can hold the socket in place. The nut will fit in the hole in the socket, so a washer is a must.