Near Side front door not locking and quote from garage to fix was best part of £200 inc the Vat. So another trawl round e-bay showed up some likely candidates. One week later and the job is done total spend £27.00 Advice to anyone replacing item :-
The tray that lines the interior door grab handle needs to be removed to reveal yet more screws if you want the trim to come off. Also only the lower half of mechanism needs to be replaced. Once you realise you can unclip the two parts you can then rotate it thus unhooking no longer required metal tie rod. Getting it back onto the dangling tie rod in door is medium difficult but whole job took me less than 2 hours.