How to find a durable lock mount?
It's a little hipster-ish and affected, but tucked between your belt and your back/hip is actually the most secure &amp; reliable U-lock carrying solution of which I am aware, and is actually much more comfortable than it sounds.  Just push the loop side down in between your belt loops, and the lock bar will prevent it falling through if you just cinch your belt up a little bit.  It's a quick and easy solution that won't wear out until your belt does.