A friend of mine who was missing this part for one of her pieces of furniture asked me if I could provide her with some 3d printed. She provided me with one as a model.
I accepted the challenge! The modeling wasn't very complex, but taking measurements on such a small and complex piece wasn't easy. But I managed, and my friend was able to finish assembling his furniture.
The two parts (base and lock) need to be printed separately. You need to bend the base slightly to slide the lock onto the rail.
My print settings for the two models (recommended):
I strongly advise against the use of PETG, as the supports would be very difficult to remove.
Slicing examples:
The author marked this model as their own original creation.