Thought not :-)

P clip sounds good, however I found another type of strain relief:
Essentially a piece of nylon flat bar with 2 or 3 holes in it through
which the cable is looped. Does not require much of a hole in the base
for access.

I do not like the aesthetics of the "side-exit" solutions, but I will
do a test diamond drill of a similar broken pottery item and if not
successful will have to go that route. It does at least give a proven
off the shelf solution.