This is my first post and I thought I would give you a tip. I recently broke my plastic door latches and was looking for a solution to replace them when I came across a shop specialized in mx-5 that sells a replica in aluminum but with a different design. I ordered a pair already and they arrived today: they look gorgeous and fit just like OEM. I will take some pictures of them and post them on the forum but I can't be happier! The interior looks so much classier with them fitted.
Here is the link to their website:
Aluminum Door Locks Assemblies
The full kit is around 300 USD + shipping IIRC.
Let me know if you get them and maybe you can post pictures of them fitted!