1960's Era Sliding Door Locks

I need to re-key or replace 4 1960 era locks/handledevices. Photo's are attached.They have held up remarkable well but have now reached the end of their life.It is a long shot I know, but do you have these available,or some version like them? Two devices lock into a fixed jamb and two are on a pair of doors that lock at the meeting style.A thumb piece in the middle of the interior handle paralleling the glass operates the lock when on the inside.I can get any other additional information that you may require or even remove and send a device to you to look at.


Thanks