Yes it’s a nightmare, although following Gareth’s advice I used a web site called Breaker Link and believe I have found one, proof of the pudding will be when it arrives though and if it is correct. So my advice would be to use them or a similar website that will check all scrapyards. Or even see if you can find a complete door.
By the way is it driver or passenger you need? As have a contact for a driver side lock but passenger seems really difficult to get?