Is there a manufacturer listed on the door? Or a logo? If so they may have a web site or Facebook page. Another source of these type of parts is Restoration Hardware.
See link
https://rh.com/catalog/sale/index.jsp?sale=true&sale=true
additional source is Van Dykes, see link https://www.vandykes.com/vintage-door-hardware/c/395/
Regards,
Tom
Tom Cornwell
Cell 316-305-3062
I didn’t see anything on these web sites. 
Similar, but I couldn’t find anything exactly like this part.
It could be made in the metal lab, someone offered t make it, yes?
Regards,
Tom
Tom Cornwell
Cell 316-305-3062
Yes. 
Hi, Are you still available to make these small hardware pieces? If you are, send me the address and time available.
Yes, I tried to message you yesterday, but for some odd reason was not able to send the message from this site.
What is a good email for you?
Snc or sbc?
Abc