Fortunately I took some of the custom wrought iron hardware I made for the doors to match the strap hinge work the owner purchased. This it the mock door section I used to make sure all the parts not only worked smoothly, but were able to be installed on the door onsite.
(above: outside view) There's a custom rubber slit in there to prevent the elements from getting moisture/snow/ice etc in the latch and freezing it up.
Inside view:
