This is the type of YKK zip has a puller which is half metal and half rubber.  Over time the rubber part breaks.   This model provides a push-in replacement.  I suggest printing in a semi-flexible.  In the picture I printed it in PP, but I'm sure PA would also be suitable or a harder TPU.

It holds with friction as the metal tab has a square hole which interfaces with a taper in the slot of the puller making it easier to push in than disconnect.  Saying that, a stop of PP primer and superglue would be stronger.

The model pictured I printed with 0.1 mm layer height with a 0.4 mm nozzle in my Core One and a PP heated bed.  No brim or supports were needed.