Hello. I wouldn't get any of the brennenstuhl sockets. They have a very weak grip on the pins meaning the plugs fall out easily.
Far better to make your own as you said. I've got boards I made back in the 70's using real sockets and they are still going strong.
The other alternative is to search for used extension leads such as this one :
https://www.ebay.co.uk/itm/Extension...kAAOSwFIRbo9FD
Should last ages. The olson ones are great value when second hand too. Here's one of those :
https://www.ebay.co.uk/itm/OLSON-DIS...frcectupt=true
Just found another good one here :
https://www.ebay.co.uk/itm/Long-PDU-...EAAOSwGDNcZTCO
The great thing about these is they use a proper socket.
David.