Sorry, nothing new by now...
And I feel like a child having upset the butterfly screw... Forums saying it was a really bad idea!!!!!
I only wanted to get more air coming in!!!!
It seems I had the issue 6yrs ago, bought the locking motor from Ebay for cheap combined order & postage from R Timms (mild prices)....
After or while having the door handle failure... (DIY mending huge screw solving it)...
MGTF / Lucas fobs...
Never could get out the door handle mechanism!
So, didn't even change the door locker. Might remember, it disappeared within a couple of months...
As spares, I have the door locker & a Trophy yellow handle... Make offer, if required!
Anyhow, howto is here: https://www.the-t-bar.com/forum/54-how-tos/92793-how-to-change-a-door-lock-mechanism