The front fender on Mary’s bike snapped loose while we were on our way for groceries, but my repair kit now once again includes a few feet of duct tape and we continued the mission:

The final fracture seems to be just the little gray section amid the older fractures, so the Planet Bike clip was hanging on by a thread:

Our bikes being equipped as alike as I can make them, another copy of the bracket I used on my bike sufficed:

Stipulated: duct tape is déclassé, but it works better than anything else I’ve tried.