I needed to replace a broken bracket for the handle on my Gorilla Cart and didn't want to wait for it to be shipped.  A new one was only $5 (plus, I assume, shipping) and includes the actual handle and bars.  However, the only thing broken was the bracket and this was faster.

I printed it with 0.3 mm layer height, 4 walls, and 15% cubic subdivision infill.  Feels like it should hold up for the long haul.