I myself replace the original hinge pin with a Pip pin. The pins with a spring loaded ball end for retention. If you can fit a true Pip, the ones with a button on the end that retracts the ball otherwise the simple spring loaded ones work fine. Generally a 5/16 pin will do the job. Some vehicles use different sizes so measure before buying.

Cheers, Charlie
If It ain't broke, Modify it!
87 Montero turbo Converted back in Spring1989
95 Montero SR 3.8 DOHC Only one?
93 Pajero 3 door 6G75 Mivec with paddle shifted 5 speed
Then a Gen2 SR with full coil independent suspension.