Never seen a bent anti-rattle bracket. And I've done a ton of laps in the central Texas heat at COTA, a track famous for brake challenges.the front-right anti-rattle bracket had bent & slipped under the pin on top & appeared to be grinding against the outside of the rotor. The dealership says they install a new anti rattle bracket & pins each time they change pads because the bracket can bend under super high temperatures ? I've had the car out for a few 120 degree f track sessions at big willow during the summer. Has anyone else had this issue?
And what you describe ... "bent & slipped under the pin on top"... sounds backwards. The bracket goes under both pins, top and bottom.
For sure, it is pretty easy to install the bracket incorrectly and still have the brakes function.
As for parts source...+1 on XPRD.