Would the locking insert only, linked below, work for you Dave?

[Linked Image]

This from Newton's 300 range but others available.

FWIW my locking part requires regular oil in lock and silicone grease on outer part to operate smoothly.


Richard

2018 Roadster 3.7
1966 Land Rover S2a 88
2024 Royal Enfield Guerrilla 450
1945 Guzzi Airone