Sorry that I didn't get back here quicker with an update...
(It took the reminder of Mr. Sunshine's lock failure, to jog my memory!
)
Anyway: my parts got here, and things are back to "norbal"....
The toughest part of the job was finding the right tools to take the latch apart...
It wasn't as easy as I had hoped it would be; but it was a manageable task...