Replaced broken handle support bracket (part #AP5620448) and cap (part #AP5620751). Used a phillips head screwdriver and allen wrench. Pliers also came in very handy.
If replacing cap and support bracket, be sure to install cap before support bracket, otherwise you'll have trouble installing the cap.
I ended up not needing to replace the fixer handle (part #AP4372038), but I'll keep it around just in case.