Looking for this part

Hello there!

I'm sorry to say that I don't recognize this part at first glance. Can you detail its function and show us a photo of it installed? It may also be helpful to see any other parts that interact with this. 

Thank you kindly for the additional photos. We don't sell a replacement or alternative for the latch you're searching for, unfortunately. I'm afraid hardware like this is a dying breed. As a result, these latches are getting harder and harder to get as the years go by. I am very sorry that we won't be able to assist with this repair but please let us know if you have any other hardware questions.