Did you find them? That’s a CCS 4000 vertical entry socket.
Cable Monkey is your best source
https://www.cablemonkey.co.uk/cat6-modules-outlets/13105-cat6-ccs-4000-series-vertical-outlets.html
Just digging this one back up as I've started installing ethernet around the house and quite like these sockets. The PCB is marked up in 568C configuration which isn't a common layout, I don't think. Does that matter? Do I just match the colours when punching down?