I've e-mailed the manufacturer and included a photo of the failed pulley. I hope he will replace or rebuild my damaged pulley.

I'm now thinking that "we" should fabricate a fender or shield or shroud piece to protect against collateral damage if / when a pulley grenades. I pulled this image off the internet to present a visual image of what I'm thinking about but really it can be just a simple fender piece that mounts above the pulley. How about some of you fabrications guys chiming in with some thoughts . . .