Hi Michael. Well, after picking myself up off the kitchen floor from a fit of kicking and crying, I'm OK now
However, I've located two original Moroccan "parts" locks, both styled after the English lock, and both have their original top screws!! I can get them both very cheap. I'm sure the patina wont be an exact match, but proper cleaning could make it close. I'll save this lock yet!!!
Actually, this has been a fun thread. Research, investigation, mystery, and contact with Brian Godwin. I'll report back after I fix the lock. Thanks again for all the assistance - and hand-holding!! LOL Rick.