I've drilled out the original, stuck a 4mm bolt thru and fixed the original. Good as gold.
The plastic retainer clips are also different so when I did fit the new one in and lifted the rod up (yes there is some slack) it just popped straight out under pressure as there was 'nothing' holding it in place.
The guy at Rare spares also told me that the rod would be "adjustable", however it's not. Inside the door the rod goes down and simply hooks onto another lever on the inside of the lock mechanism, nothing adjustable in there.
Are all doors across the model range the same?? Maybe GL door handles are different to ESP to Fairlanes??