I had one 375 Win Lee sizer die that was rough as all get out on the inside. I mailed it to Lee with a short note and they sent me a new one in just a few days.
I've been useing a Lee Classic Cast press for swageing bullets and found out that the press handle was hollow when it bent. It just happened to be the same size as a Dillon 550 handle, so I found one on Ebay to replace it.
Back in the 80s, the Lee hand prime tool was made of pot metal and the head would break off occasionally. It was a great tool except for that. They were only $15, so you would just buy a new one...