@jojoe have a look here and scroll down to see pictures of such a lock https://www.speakev.com/threads/securing-a-cable-at-home-nice-wall-anchor.12130/
Here is a retractable cable tether https://evocharge.com/wp-content/uploads/2021/02/701038_Retractor_Installation_Manual_Rev.-A_Final.pdf
Your best bet would have been a tethered charge cable for security point of view.
Have you tried the likes of Halfords?
Joss
Current car: BMW X2 sDrive 20i M Sport 5dr Step Auto In metallic Portimão Blue. 04:10:2025
Previous car:Peugeot 308 GT Premium 1.2 Pure tech Petrol.