I have a carbon frame bike and I don't want to use traditional ulock mount at the top because it creates a stress point by compressing. And the bottom section of this bike is too thick for the holder.
This isn't a ulock, but it's the same idea.
It's a 0.9 lb bike lock made from Titanium. They cost $99 and come with a water bottle cage mount as shown.
TiGr® mini Bike Lock enter link description here