I checked it out, Kevin - thanks
I was able to remove the rear door lock.
The lock retainer-clip fell inside the door, but, I was able to reach it with a long flexible magnet, after removing the right-rear door-lock assembly.
That rear door lock is a different style from the side door locks.
The replacement side-door-lock that I bought is no good.
And, there are are no codes/numbers on the side of this lock.
However, maybe a locksmith can figure out how to make a key for it?
