Crusier - Sorry no PM coming as what I thought was extra latch handles was my replacement window crank handles.

That said, I took some pics of the existing handle on my '51. They are original from what I know and are definitely different than your pictured one. My vote is yours are the wrong handles. Before you go order brand new handles though, maybe post an ad in the
Truck Parts Wanted forum. I'm betting someone probably has some nice used ones they would offer up.

Also wanted to mention that I recall you said in your
Project Journal that you installed Altman latches on your doors. I don't think your above pictured drivers door latch mechanism needs replacing, but don't know enough not being able to see the entire door and latch setup.